./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:52:37,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:52:37,358 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:52:37,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:52:37,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:52:37,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:52:37,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:52:37,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:52:37,388 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:52:37,388 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:52:37,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:52:37,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:52:37,389 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:52:37,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:52:37,390 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:52:37,390 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:37,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:52:37,391 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:52:37,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:52:37,392 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 -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 [2025-03-03 13:52:37,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:52:37,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:52:37,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:52:37,592 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:52:37,592 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:52:37,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2025-03-03 13:52:38,727 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71a325f/7e8c7a1c2ef7446884990246cc0b5758/FLAG8ad22b38a [2025-03-03 13:52:38,946 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:52:38,946 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2025-03-03 13:52:38,954 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71a325f/7e8c7a1c2ef7446884990246cc0b5758/FLAG8ad22b38a [2025-03-03 13:52:38,968 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71a325f/7e8c7a1c2ef7446884990246cc0b5758 [2025-03-03 13:52:38,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:52:38,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:52:38,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:38,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:52:38,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:52:38,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6455038e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38, skipping insertion in model container [2025-03-03 13:52:38,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:52:39,089 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/egcd3-ll_valuebound20.c[490,503] [2025-03-03 13:52:39,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:39,112 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:52:39,119 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/egcd3-ll_valuebound20.c[490,503] [2025-03-03 13:52:39,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:39,135 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:52:39,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39 WrapperNode [2025-03-03 13:52:39,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:39,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:39,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:52:39,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:52:39,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,156 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2025-03-03 13:52:39,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:39,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:52:39,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:52:39,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:52:39,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,171 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:52:39,171 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,173 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,175 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:52:39,176 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:52:39,176 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:52:39,176 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:52:39,177 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:52:39,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:52:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:52:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:52:39,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:52:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:52:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:52:39,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:52:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:52:39,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:52:39,261 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:52:39,263 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:52:39,396 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:52:39,399 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:52:39,405 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:52:39,405 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:52:39,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:39 BoogieIcfgContainer [2025-03-03 13:52:39,406 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:52:39,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:52:39,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:52:39,411 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:52:39,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:52:38" (1/3) ... [2025-03-03 13:52:39,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43849089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:39, skipping insertion in model container [2025-03-03 13:52:39,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (2/3) ... [2025-03-03 13:52:39,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43849089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:39, skipping insertion in model container [2025-03-03 13:52:39,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:39" (3/3) ... [2025-03-03 13:52:39,413 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2025-03-03 13:52:39,422 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:52:39,423 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound20.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:52:39,456 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:52:39,465 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;@5249ffe9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:52:39,466 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:52:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-03 13:52:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:39,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,474 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:39,474 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash -743363080, now seen corresponding path program 1 times [2025-03-03 13:52:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385638700] [2025-03-03 13:52:39,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:39,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:39,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385638700] [2025-03-03 13:52:39,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385638700] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:39,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238808509] [2025-03-03 13:52:39,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:39,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:52:39,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:52:39,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:39,652 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238808509] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:39,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:39,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:52:39,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057360500] [2025-03-03 13:52:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:39,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:52:39,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:39,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:52:39,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:39,670 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:39,682 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2025-03-03 13:52:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:52:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-03 13:52:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:39,686 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:52:39,686 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:52:39,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:39,689 INFO L435 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:39,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:52:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 13:52:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:52:39,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2025-03-03 13:52:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:39,714 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:52:39,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:52:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:39,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,715 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:39,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:52:39,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:52:39,916 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090086, now seen corresponding path program 1 times [2025-03-03 13:52:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979131855] [2025-03-03 13:52:39,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979131855] [2025-03-03 13:52:40,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979131855] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:40,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:40,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:52:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698163628] [2025-03-03 13:52:40,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:52:40,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:52:40,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,105 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,192 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-03 13:52:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-03 13:52:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,193 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:52:40,193 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:52:40,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,194 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:52:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-03 13:52:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-03 13:52:40,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2025-03-03 13:52:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,200 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-03 13:52:40,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-03 13:52:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:52:40,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,203 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:40,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:52:40,204 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:40,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash -602638456, now seen corresponding path program 1 times [2025-03-03 13:52:40,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:40,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057473713] [2025-03-03 13:52:40,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:40,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:40,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:40,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:40,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7865713] [2025-03-03 13:52:40,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:40,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:52:40,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:40,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:40,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:40,329 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:40,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057473713] [2025-03-03 13:52:40,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7865713] [2025-03-03 13:52:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7865713] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:40,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431066551] [2025-03-03 13:52:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:40,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:40,333 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,374 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2025-03-03 13:52:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2025-03-03 13:52:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,375 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:52:40,375 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:52:40,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,376 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:52:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-03 13:52:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:52:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2025-03-03 13:52:40,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2025-03-03 13:52:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,386 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2025-03-03 13:52:40,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2025-03-03 13:52:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:52:40,387 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,387 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:40,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:40,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 13:52:40,587 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:40,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1811518815, now seen corresponding path program 1 times [2025-03-03 13:52:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365436261] [2025-03-03 13:52:40,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:40,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:40,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:40,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365436261] [2025-03-03 13:52:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365436261] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283998769] [2025-03-03 13:52:40,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:40,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:52:40,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:40,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:40,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283998769] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:40,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:52:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158500546] [2025-03-03 13:52:40,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:52:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:52:40,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:52:40,935 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,063 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2025-03-03 13:52:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:52:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-03 13:52:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,065 INFO L225 Difference]: With dead ends: 82 [2025-03-03 13:52:41,065 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 13:52:41,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:52:41,066 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 13:52:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2025-03-03 13:52:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2025-03-03 13:52:41,083 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2025-03-03 13:52:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,083 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2025-03-03 13:52:41,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2025-03-03 13:52:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:52:41,084 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,084 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:41,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,284 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash 356055075, now seen corresponding path program 1 times [2025-03-03 13:52:41,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209268165] [2025-03-03 13:52:41,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:41,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:41,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:41,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572500776] [2025-03-03 13:52:41,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:41,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:41,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:52:41,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:41,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:41,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:52:41,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209268165] [2025-03-03 13:52:41,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:41,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572500776] [2025-03-03 13:52:41,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572500776] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:41,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-03 13:52:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081192664] [2025-03-03 13:52:41,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:52:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:52:41,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:41,497 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,579 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2025-03-03 13:52:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:41,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-03-03 13:52:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,581 INFO L225 Difference]: With dead ends: 83 [2025-03-03 13:52:41,581 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:52:41,581 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:52:41,581 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:52:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2025-03-03 13:52:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2025-03-03 13:52:41,593 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2025-03-03 13:52:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,593 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2025-03-03 13:52:41,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2025-03-03 13:52:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:52:41,594 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,594 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:41,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,795 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -737481304, now seen corresponding path program 2 times [2025-03-03 13:52:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684582865] [2025-03-03 13:52:41,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,801 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:52:41,809 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:52:41,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:41,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684582865] [2025-03-03 13:52:41,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684582865] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:41,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:41,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:41,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227788773] [2025-03-03 13:52:41,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:41,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:41,883 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,955 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2025-03-03 13:52:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2025-03-03 13:52:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,957 INFO L225 Difference]: With dead ends: 116 [2025-03-03 13:52:41,957 INFO L226 Difference]: Without dead ends: 87 [2025-03-03 13:52:41,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:52:41,959 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-03 13:52:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2025-03-03 13:52:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2025-03-03 13:52:41,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2025-03-03 13:52:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,977 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2025-03-03 13:52:41,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2025-03-03 13:52:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:52:41,979 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,979 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:52:41,979 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash 437747302, now seen corresponding path program 1 times [2025-03-03 13:52:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026814855] [2025-03-03 13:52:41,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:41,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:41,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:41,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888712663] [2025-03-03 13:52:41,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:52:42,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:42,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:42,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:42,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026814855] [2025-03-03 13:52:42,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888712663] [2025-03-03 13:52:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888712663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:42,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:52:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201879314] [2025-03-03 13:52:42,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:52:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:52:42,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:42,191 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,319 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:52:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:52:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2025-03-03 13:52:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,321 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:52:42,321 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:52:42,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:52:42,322 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:52:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2025-03-03 13:52:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2025-03-03 13:52:42,334 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2025-03-03 13:52:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,334 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2025-03-03 13:52:42,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2025-03-03 13:52:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 13:52:42,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,337 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:42,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:42,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,541 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1953213885, now seen corresponding path program 1 times [2025-03-03 13:52:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882048764] [2025-03-03 13:52:42,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:42,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:42,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102459775] [2025-03-03 13:52:42,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:52:42,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:42,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:42,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 13:52:42,628 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882048764] [2025-03-03 13:52:42,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102459775] [2025-03-03 13:52:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102459775] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206275980] [2025-03-03 13:52:42,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,630 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,680 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2025-03-03 13:52:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-03-03 13:52:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,681 INFO L225 Difference]: With dead ends: 104 [2025-03-03 13:52:42,682 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:52:42,682 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 [2025-03-03 13:52:42,683 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:52:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2025-03-03 13:52:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-03 13:52:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 13:52:42,705 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2025-03-03 13:52:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,705 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 13:52:42,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 13:52:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:52:42,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,709 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2025-03-03 13:52:42,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:42,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,909 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash -762809663, now seen corresponding path program 1 times [2025-03-03 13:52:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620295768] [2025-03-03 13:52:42,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162721111] [2025-03-03 13:52:42,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:52:42,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 13:52:42,989 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620295768] [2025-03-03 13:52:42,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162721111] [2025-03-03 13:52:42,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162721111] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843725344] [2025-03-03 13:52:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,991 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:43,041 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2025-03-03 13:52:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:43,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 45 [2025-03-03 13:52:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:43,043 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:52:43,043 INFO L226 Difference]: Without dead ends: 146 [2025-03-03 13:52:43,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:43,043 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:43,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-03 13:52:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2025-03-03 13:52:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2025-03-03 13:52:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2025-03-03 13:52:43,080 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2025-03-03 13:52:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:43,080 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2025-03-03 13:52:43,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2025-03-03 13:52:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 13:52:43,081 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:43,081 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2025-03-03 13:52:43,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:43,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:43,282 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:43,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 17136405, now seen corresponding path program 1 times [2025-03-03 13:52:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:43,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49089934] [2025-03-03 13:52:43,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:43,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:43,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:43,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:43,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023589761] [2025-03-03 13:52:43,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:43,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:43,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:52:43,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:43,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:43,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:43,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:52:43,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 13:52:43,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:52:44,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49089934] [2025-03-03 13:52:44,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023589761] [2025-03-03 13:52:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023589761] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:44,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:44,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-03 13:52:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072701864] [2025-03-03 13:52:44,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:44,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:52:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:44,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:52:44,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:44,106 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:45,836 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2025-03-03 13:52:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 13:52:45,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-03-03 13:52:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:45,839 INFO L225 Difference]: With dead ends: 358 [2025-03-03 13:52:45,839 INFO L226 Difference]: Without dead ends: 276 [2025-03-03 13:52:45,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:52:45,842 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:45,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:52:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2025-03-03 13:52:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2025-03-03 13:52:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2025-03-03 13:52:45,915 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2025-03-03 13:52:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:45,915 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2025-03-03 13:52:45,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2025-03-03 13:52:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 13:52:45,916 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:45,916 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:45,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:52:46,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:52:46,120 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:46,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1304203768, now seen corresponding path program 1 times [2025-03-03 13:52:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:46,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123487078] [2025-03-03 13:52:46,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:46,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:46,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:46,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531742657] [2025-03-03 13:52:46,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:46,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:46,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:46,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:52:46,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:46,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:46,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:46,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 13:52:46,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 13:52:46,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-03 13:52:46,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123487078] [2025-03-03 13:52:46,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531742657] [2025-03-03 13:52:46,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531742657] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:46,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-03 13:52:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096047695] [2025-03-03 13:52:46,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:46,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:46,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:46,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:46,643 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,900 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2025-03-03 13:52:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:47,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2025-03-03 13:52:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,902 INFO L225 Difference]: With dead ends: 255 [2025-03-03 13:52:47,902 INFO L226 Difference]: Without dead ends: 253 [2025-03-03 13:52:47,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:52:47,905 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:47,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:52:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-03 13:52:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2025-03-03 13:52:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2025-03-03 13:52:47,962 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2025-03-03 13:52:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:47,963 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2025-03-03 13:52:47,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2025-03-03 13:52:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 13:52:47,964 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:47,964 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:47,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:48,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:48,165 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:48,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1091825569, now seen corresponding path program 2 times [2025-03-03 13:52:48,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:48,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292422921] [2025-03-03 13:52:48,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:48,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:48,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:48,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:48,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173737409] [2025-03-03 13:52:48,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:48,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:48,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:48,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:52:48,211 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:48,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:48,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:48,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:48,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-03-03 13:52:48,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-03 13:52:48,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-03 13:52:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292422921] [2025-03-03 13:52:49,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173737409] [2025-03-03 13:52:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173737409] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:49,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:49,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2025-03-03 13:52:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920246216] [2025-03-03 13:52:49,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:49,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:52:49,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:49,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:52:49,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:49,183 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:52,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:52:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:53,458 INFO L93 Difference]: Finished difference Result 388 states and 583 transitions. [2025-03-03 13:52:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-03 13:52:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 64 [2025-03-03 13:52:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:53,464 INFO L225 Difference]: With dead ends: 388 [2025-03-03 13:52:53,465 INFO L226 Difference]: Without dead ends: 327 [2025-03-03 13:52:53,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 13:52:53,467 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:53,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 368 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-03-03 13:52:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-03 13:52:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 280. [2025-03-03 13:52:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 139 states have (on average 1.2805755395683454) internal successors, (178), 150 states have internal predecessors, (178), 121 states have call successors, (121), 19 states have call predecessors, (121), 19 states have return successors, (120), 110 states have call predecessors, (120), 120 states have call successors, (120) [2025-03-03 13:52:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 419 transitions. [2025-03-03 13:52:53,569 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 419 transitions. Word has length 64 [2025-03-03 13:52:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:53,569 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 419 transitions. [2025-03-03 13:52:53,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 419 transitions. [2025-03-03 13:52:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-03 13:52:53,570 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:53,570 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 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] [2025-03-03 13:52:53,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:53,770 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,SelfDestructingSolverStorable11 [2025-03-03 13:52:53,770 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:53,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1883736123, now seen corresponding path program 1 times [2025-03-03 13:52:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564606443] [2025-03-03 13:52:53,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:53,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:53,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:53,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:53,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:53,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021376885] [2025-03-03 13:52:53,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:53,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:53,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:52:53,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:53,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:53,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:53,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:53,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 13:52:53,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 13:52:54,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:54,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564606443] [2025-03-03 13:52:54,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021376885] [2025-03-03 13:52:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021376885] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:54,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:54,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142267948] [2025-03-03 13:52:54,752 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:54,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:54,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:54,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:52:54,753 INFO L87 Difference]: Start difference. First operand 280 states and 419 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:55,516 INFO L93 Difference]: Finished difference Result 357 states and 538 transitions. [2025-03-03 13:52:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:55,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2025-03-03 13:52:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:55,519 INFO L225 Difference]: With dead ends: 357 [2025-03-03 13:52:55,519 INFO L226 Difference]: Without dead ends: 350 [2025-03-03 13:52:55,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:52:55,519 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:55,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 431 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:52:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-03 13:52:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2025-03-03 13:52:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 163 states have (on average 1.294478527607362) internal successors, (211), 177 states have internal predecessors, (211), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 143 states have call predecessors, (156), 156 states have call successors, (156) [2025-03-03 13:52:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2025-03-03 13:52:55,647 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 79 [2025-03-03 13:52:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:55,647 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2025-03-03 13:52:55,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2025-03-03 13:52:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 13:52:55,648 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:55,649 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:55,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:55,849 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,SelfDestructingSolverStorable12 [2025-03-03 13:52:55,849 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:55,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1658792811, now seen corresponding path program 2 times [2025-03-03 13:52:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245155924] [2025-03-03 13:52:55,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:55,854 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:55,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:55,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:55,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245155924] [2025-03-03 13:52:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245155924] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022030246] [2025-03-03 13:52:56,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:56,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:56,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:52:56,029 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:56,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:56,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:56,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:56,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:52:56,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:56,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:56,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022030246] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:56,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-03 13:52:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764596468] [2025-03-03 13:52:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:56,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:52:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:56,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:52:56,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:56,184 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:56,590 INFO L93 Difference]: Finished difference Result 580 states and 882 transitions. [2025-03-03 13:52:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:52:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2025-03-03 13:52:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:56,592 INFO L225 Difference]: With dead ends: 580 [2025-03-03 13:52:56,592 INFO L226 Difference]: Without dead ends: 357 [2025-03-03 13:52:56,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:56,593 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:56,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 331 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-03 13:52:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 262. [2025-03-03 13:52:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 139 states have internal predecessors, (173), 103 states have call successors, (103), 21 states have call predecessors, (103), 21 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 378 transitions. [2025-03-03 13:52:56,685 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 378 transitions. Word has length 84 [2025-03-03 13:52:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:56,686 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 378 transitions. [2025-03-03 13:52:56,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 378 transitions. [2025-03-03 13:52:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 13:52:56,686 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:56,687 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:56,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:56,887 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,SelfDestructingSolverStorable13 [2025-03-03 13:52:56,887 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:56,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 996745083, now seen corresponding path program 1 times [2025-03-03 13:52:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880402463] [2025-03-03 13:52:56,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:56,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:56,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:56,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:56,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749442304] [2025-03-03 13:52:56,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:56,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:56,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:52:56,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:56,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:56,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:56,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:56,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:52:56,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-03-03 13:52:57,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-03 13:52:57,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880402463] [2025-03-03 13:52:57,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749442304] [2025-03-03 13:52:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749442304] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:57,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:57,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-03 13:52:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587462018] [2025-03-03 13:52:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:57,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:57,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:57,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:57,091 INFO L87 Difference]: Start difference. First operand 262 states and 378 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:57,230 INFO L93 Difference]: Finished difference Result 272 states and 386 transitions. [2025-03-03 13:52:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2025-03-03 13:52:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:57,232 INFO L225 Difference]: With dead ends: 272 [2025-03-03 13:52:57,232 INFO L226 Difference]: Without dead ends: 270 [2025-03-03 13:52:57,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:52:57,233 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:57,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-03 13:52:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2025-03-03 13:52:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 145 states have internal predecessors, (179), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2025-03-03 13:52:57,316 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 92 [2025-03-03 13:52:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:57,316 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2025-03-03 13:52:57,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2025-03-03 13:52:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 13:52:57,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:57,317 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:57,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 13:52:57,517 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,SelfDestructingSolverStorable14 [2025-03-03 13:52:57,518 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:57,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1015960117, now seen corresponding path program 2 times [2025-03-03 13:52:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:57,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557663742] [2025-03-03 13:52:57,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:57,522 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:57,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:57,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:57,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647989373] [2025-03-03 13:52:57,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:57,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:57,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:52:57,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:57,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:57,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:57,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:57,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:52:57,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:58,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:58,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:58,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557663742] [2025-03-03 13:52:58,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:58,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647989373] [2025-03-03 13:52:58,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647989373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:58,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:58,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2025-03-03 13:52:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252949528] [2025-03-03 13:52:58,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:58,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:58,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:58,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:58,437 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:53:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:03,355 INFO L93 Difference]: Finished difference Result 459 states and 701 transitions. [2025-03-03 13:53:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-03 13:53:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 97 [2025-03-03 13:53:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:03,358 INFO L225 Difference]: With dead ends: 459 [2025-03-03 13:53:03,358 INFO L226 Difference]: Without dead ends: 451 [2025-03-03 13:53:03,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 13:53:03,359 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 130 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:03,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 779 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-03 13:53:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2025-03-03 13:53:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 313. [2025-03-03 13:53:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 157 states have (on average 1.286624203821656) internal successors, (202), 159 states have internal predecessors, (202), 131 states have call successors, (131), 24 states have call predecessors, (131), 24 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2025-03-03 13:53:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2025-03-03 13:53:03,488 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 97 [2025-03-03 13:53:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:03,488 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2025-03-03 13:53:03,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:53:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2025-03-03 13:53:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-03 13:53:03,489 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:03,490 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:03,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:03,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:03,690 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:03,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:03,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1295956566, now seen corresponding path program 3 times [2025-03-03 13:53:03,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:03,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213543057] [2025-03-03 13:53:03,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:03,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:53:03,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:53:03,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:53:03,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855346452] [2025-03-03 13:53:03,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:03,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:03,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:03,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:53:03,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:53:03,796 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 63 of 99 statements. [2025-03-03 13:53:03,796 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:53:03,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:03,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-03 13:53:03,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 80 proven. 29 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-03-03 13:53:04,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213543057] [2025-03-03 13:53:05,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855346452] [2025-03-03 13:53:05,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855346452] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:05,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:05,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:53:05,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356489900] [2025-03-03 13:53:05,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:05,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:53:05,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:05,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:53:05,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:53:05,486 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:53:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:06,206 INFO L93 Difference]: Finished difference Result 391 states and 569 transitions. [2025-03-03 13:53:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:53:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2025-03-03 13:53:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:06,208 INFO L225 Difference]: With dead ends: 391 [2025-03-03 13:53:06,209 INFO L226 Difference]: Without dead ends: 384 [2025-03-03 13:53:06,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:53:06,209 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:06,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 251 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:53:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-03 13:53:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2025-03-03 13:53:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 191 states have internal predecessors, (243), 155 states have call successors, (155), 29 states have call predecessors, (155), 29 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2025-03-03 13:53:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 552 transitions. [2025-03-03 13:53:06,360 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 552 transitions. Word has length 99 [2025-03-03 13:53:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:06,360 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 552 transitions. [2025-03-03 13:53:06,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:53:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 552 transitions. [2025-03-03 13:53:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:53:06,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:06,361 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:06,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:06,562 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,SelfDestructingSolverStorable16 [2025-03-03 13:53:06,562 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:06,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1346848239, now seen corresponding path program 4 times [2025-03-03 13:53:06,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:06,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136244216] [2025-03-03 13:53:06,562 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:06,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:06,566 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:53:06,578 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:06,578 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:06,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590408554] [2025-03-03 13:53:06,579 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:06,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:06,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:06,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:53:06,606 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:53:06,629 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 97 of 102 statements. [2025-03-03 13:53:06,630 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:53:06,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-03 13:53:06,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:53:07,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:53:07,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136244216] [2025-03-03 13:53:07,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590408554] [2025-03-03 13:53:07,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590408554] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:07,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:07,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2025-03-03 13:53:07,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858235617] [2025-03-03 13:53:07,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:07,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:53:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:07,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:53:07,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:53:07,780 INFO L87 Difference]: Start difference. First operand 374 states and 552 transitions. Second operand has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-03 13:53:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:17,810 INFO L93 Difference]: Finished difference Result 619 states and 956 transitions. [2025-03-03 13:53:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2025-03-03 13:53:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 102 [2025-03-03 13:53:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:17,813 INFO L225 Difference]: With dead ends: 619 [2025-03-03 13:53:17,813 INFO L226 Difference]: Without dead ends: 611 [2025-03-03 13:53:17,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4040 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2038, Invalid=11534, Unknown=0, NotChecked=0, Total=13572 [2025-03-03 13:53:17,816 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 286 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:17,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 611 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2025-03-03 13:53:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2025-03-03 13:53:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 471. [2025-03-03 13:53:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 235 states have (on average 1.297872340425532) internal successors, (305), 237 states have internal predecessors, (305), 203 states have call successors, (203), 32 states have call predecessors, (203), 32 states have return successors, (202), 201 states have call predecessors, (202), 202 states have call successors, (202) [2025-03-03 13:53:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 710 transitions. [2025-03-03 13:53:18,103 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 710 transitions. Word has length 102 [2025-03-03 13:53:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:18,103 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 710 transitions. [2025-03-03 13:53:18,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-03 13:53:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 710 transitions. [2025-03-03 13:53:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:53:18,104 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:18,105 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:18,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:18,309 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,SelfDestructingSolverStorable17 [2025-03-03 13:53:18,309 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:18,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1473706161, now seen corresponding path program 5 times [2025-03-03 13:53:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:18,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765316570] [2025-03-03 13:53:18,309 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:18,313 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:18,333 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:18,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:18,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:18,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789934796] [2025-03-03 13:53:18,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:18,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:18,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:18,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:53:18,369 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:18,436 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:18,436 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:18,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:18,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-03 13:53:18,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 67 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-03 13:53:19,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:25,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:25,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765316570] [2025-03-03 13:53:25,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:25,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789934796] [2025-03-03 13:53:25,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789934796] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:25,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:25,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-03 13:53:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375707317] [2025-03-03 13:53:25,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:25,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:53:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:25,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:53:25,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=815, Unknown=1, NotChecked=0, Total=930 [2025-03-03 13:53:25,404 INFO L87 Difference]: Start difference. First operand 471 states and 710 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:26,530 INFO L93 Difference]: Finished difference Result 551 states and 823 transitions. [2025-03-03 13:53:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:53:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 102 [2025-03-03 13:53:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:26,534 INFO L225 Difference]: With dead ends: 551 [2025-03-03 13:53:26,534 INFO L226 Difference]: Without dead ends: 544 [2025-03-03 13:53:26,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=202, Invalid=1357, Unknown=1, NotChecked=0, Total=1560 [2025-03-03 13:53:26,534 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:26,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 565 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:53:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2025-03-03 13:53:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 529. [2025-03-03 13:53:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 263 states have internal predecessors, (340), 231 states have call successors, (231), 36 states have call predecessors, (231), 36 states have return successors, (230), 229 states have call predecessors, (230), 230 states have call successors, (230) [2025-03-03 13:53:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 801 transitions. [2025-03-03 13:53:26,861 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 801 transitions. Word has length 102 [2025-03-03 13:53:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:26,861 INFO L471 AbstractCegarLoop]: Abstraction has 529 states and 801 transitions. [2025-03-03 13:53:26,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 801 transitions. [2025-03-03 13:53:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-03 13:53:26,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:26,863 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:26,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:27,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:27,067 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:27,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -721263382, now seen corresponding path program 6 times [2025-03-03 13:53:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756369517] [2025-03-03 13:53:27,067 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:27,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:27,072 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:27,085 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 13:53:27,085 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 13:53:27,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183909391] [2025-03-03 13:53:27,086 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:27,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:27,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:27,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:53:27,114 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:27,152 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 87 of 105 statements. [2025-03-03 13:53:27,152 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:53:27,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:27,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-03 13:53:27,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2025-03-03 13:53:27,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:28,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756369517] [2025-03-03 13:53:28,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:28,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183909391] [2025-03-03 13:53:28,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183909391] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:28,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-03-03 13:53:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100687184] [2025-03-03 13:53:28,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:28,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:53:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:28,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:53:28,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:53:28,617 INFO L87 Difference]: Start difference. First operand 529 states and 801 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:29,872 INFO L93 Difference]: Finished difference Result 688 states and 1049 transitions. [2025-03-03 13:53:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:53:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 105 [2025-03-03 13:53:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:29,875 INFO L225 Difference]: With dead ends: 688 [2025-03-03 13:53:29,875 INFO L226 Difference]: Without dead ends: 685 [2025-03-03 13:53:29,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:53:29,877 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:29,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 661 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:53:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2025-03-03 13:53:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 665. [2025-03-03 13:53:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 318 states have (on average 1.320754716981132) internal successors, (420), 320 states have internal predecessors, (420), 303 states have call successors, (303), 43 states have call predecessors, (303), 43 states have return successors, (302), 301 states have call predecessors, (302), 302 states have call successors, (302) [2025-03-03 13:53:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1025 transitions. [2025-03-03 13:53:30,314 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1025 transitions. Word has length 105 [2025-03-03 13:53:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:30,314 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 1025 transitions. [2025-03-03 13:53:30,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1025 transitions. [2025-03-03 13:53:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 13:53:30,316 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:30,316 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:30,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:30,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:30,520 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:30,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1862646870, now seen corresponding path program 2 times [2025-03-03 13:53:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:30,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29277380] [2025-03-03 13:53:30,520 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:30,524 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:30,536 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:30,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:30,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:30,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522200948] [2025-03-03 13:53:30,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:30,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:30,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:30,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:53:30,564 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:30,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:30,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:30,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:30,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-03 13:53:30,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2025-03-03 13:53:31,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-03 13:53:32,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29277380] [2025-03-03 13:53:32,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522200948] [2025-03-03 13:53:32,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522200948] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:32,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:32,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2025-03-03 13:53:32,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125202560] [2025-03-03 13:53:32,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:32,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 13:53:32,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:32,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 13:53:32,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:53:32,450 INFO L87 Difference]: Start difference. First operand 665 states and 1025 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-03 13:53:44,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:53:46,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:54:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:54:02,733 INFO L93 Difference]: Finished difference Result 969 states and 1521 transitions. [2025-03-03 13:54:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-03-03 13:54:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2025-03-03 13:54:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:54:02,738 INFO L225 Difference]: With dead ends: 969 [2025-03-03 13:54:02,738 INFO L226 Difference]: Without dead ends: 967 [2025-03-03 13:54:02,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=2276, Invalid=9066, Unknown=0, NotChecked=0, Total=11342 [2025-03-03 13:54:02,741 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 232 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 326 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:54:02,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 745 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1611 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2025-03-03 13:54:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2025-03-03 13:54:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 853. [2025-03-03 13:54:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 406 states have (on average 1.3374384236453203) internal successors, (543), 409 states have internal predecessors, (543), 397 states have call successors, (397), 49 states have call predecessors, (397), 49 states have return successors, (396), 394 states have call predecessors, (396), 396 states have call successors, (396) [2025-03-03 13:54:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1336 transitions. [2025-03-03 13:54:03,519 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1336 transitions. Word has length 108 [2025-03-03 13:54:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:54:03,519 INFO L471 AbstractCegarLoop]: Abstraction has 853 states and 1336 transitions. [2025-03-03 13:54:03,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-03 13:54:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1336 transitions. [2025-03-03 13:54:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-03 13:54:03,522 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:54:03,522 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 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] [2025-03-03 13:54:03,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 13:54:03,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:03,726 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:03,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1816468747, now seen corresponding path program 7 times [2025-03-03 13:54:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605809079] [2025-03-03 13:54:03,726 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:54:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:03,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:54:03,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:54:03,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:54:03,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:54:03,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:54:03,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605809079] [2025-03-03 13:54:03,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605809079] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:54:03,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15150273] [2025-03-03 13:54:03,836 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:54:03,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:54:03,837 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:54:03,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:54:03,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:54:03,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:54:03,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:54:03,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:03,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 13:54:03,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 236 proven. 15 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-03 13:54:03,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:54:04,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15150273] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:04,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:54:04,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 13:54:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982445788] [2025-03-03 13:54:04,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:04,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:54:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:04,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:54:04,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:54:04,017 INFO L87 Difference]: Start difference. First operand 853 states and 1336 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:54:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:54:05,079 INFO L93 Difference]: Finished difference Result 1519 states and 2413 transitions. [2025-03-03 13:54:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:54:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 120 [2025-03-03 13:54:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:54:05,085 INFO L225 Difference]: With dead ends: 1519 [2025-03-03 13:54:05,085 INFO L226 Difference]: Without dead ends: 1028 [2025-03-03 13:54:05,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:54:05,087 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:54:05,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 207 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:54:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2025-03-03 13:54:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 966. [2025-03-03 13:54:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 445 states have (on average 1.350561797752809) internal successors, (601), 462 states have internal predecessors, (601), 471 states have call successors, (471), 49 states have call predecessors, (471), 49 states have return successors, (470), 454 states have call predecessors, (470), 470 states have call successors, (470) [2025-03-03 13:54:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1542 transitions. [2025-03-03 13:54:06,039 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1542 transitions. Word has length 120 [2025-03-03 13:54:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:54:06,039 INFO L471 AbstractCegarLoop]: Abstraction has 966 states and 1542 transitions. [2025-03-03 13:54:06,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:54:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1542 transitions. [2025-03-03 13:54:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-03 13:54:06,041 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:54:06,041 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:54:06,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 13:54:06,245 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,SelfDestructingSolverStorable21 [2025-03-03 13:54:06,245 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:06,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1388475109, now seen corresponding path program 8 times [2025-03-03 13:54:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:06,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502499655] [2025-03-03 13:54:06,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:06,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:06,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-03 13:54:06,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:54:06,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:06,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:54:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81054691] [2025-03-03 13:54:06,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:54:06,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:54:06,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:54:06,296 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-03 13:54:06,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:54:06,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:06,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:06,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-03 13:54:06,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2025-03-03 13:54:07,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 34 proven. 80 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-03 13:54:08,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:54:08,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502499655] [2025-03-03 13:54:08,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:54:08,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81054691] [2025-03-03 13:54:08,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81054691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:08,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:54:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2025-03-03 13:54:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664247245] [2025-03-03 13:54:08,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:08,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:54:08,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:08,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:54:08,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:54:08,029 INFO L87 Difference]: Start difference. First operand 966 states and 1542 transitions. Second operand has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38)