./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:21:30,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:21:30,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:21:30,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:21:30,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:21:30,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:21:30,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:21:30,214 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:21:30,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:21:30,214 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:21:30,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:21:30,215 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:21:30,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:21:30,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:21:30,216 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:21:30,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:21:30,217 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:21:30,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:21:30,217 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 -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 [2025-03-16 18:21:30,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:21:30,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:21:30,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:21:30,440 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:21:30,440 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:21:30,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2025-03-16 18:21:31,552 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd39bdd3b/980e68e7580b4f75ae3ab94d5c6ed518/FLAGc0bcb6421 [2025-03-16 18:21:31,764 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:21:31,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2025-03-16 18:21:31,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd39bdd3b/980e68e7580b4f75ae3ab94d5c6ed518/FLAGc0bcb6421 [2025-03-16 18:21:32,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd39bdd3b/980e68e7580b4f75ae3ab94d5c6ed518 [2025-03-16 18:21:32,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:21:32,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:21:32,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:21:32,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:21:32,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:21:32,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c4a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32, skipping insertion in model container [2025-03-16 18:21:32,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,121 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:21:32,209 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/hard2_valuebound5.c[526,539] [2025-03-16 18:21:32,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:21:32,225 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:21:32,231 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/hard2_valuebound5.c[526,539] [2025-03-16 18:21:32,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:21:32,247 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:21:32,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32 WrapperNode [2025-03-16 18:21:32,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:21:32,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:21:32,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:21:32,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:21:32,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,266 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2025-03-16 18:21:32,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:21:32,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:21:32,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:21:32,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:21:32,271 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,271 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,279 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-03-16 18:21:32,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,281 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:21:32,284 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:21:32,285 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:21:32,285 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:21:32,285 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (1/1) ... [2025-03-16 18:21:32,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:21:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:32,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:21:32,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:21:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:21:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:21:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 18:21:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:21:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:21:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:21:32,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:21:32,363 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:21:32,365 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:21:32,490 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 18:21:32,493 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:21:32,499 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:21:32,500 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:21:32,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:32 BoogieIcfgContainer [2025-03-16 18:21:32,500 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:21:32,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:21:32,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:21:32,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:21:32,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:21:32" (1/3) ... [2025-03-16 18:21:32,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600b8e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:21:32, skipping insertion in model container [2025-03-16 18:21:32,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:32" (2/3) ... [2025-03-16 18:21:32,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600b8e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:21:32, skipping insertion in model container [2025-03-16 18:21:32,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:32" (3/3) ... [2025-03-16 18:21:32,507 INFO L128 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2025-03-16 18:21:32,517 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:21:32,519 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard2_valuebound5.c that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:21:32,563 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:21:32,572 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;@52549a68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:21:32,573 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:21:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 18:21:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 18:21:32,580 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:32,580 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:32,580 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:32,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1301550854, now seen corresponding path program 1 times [2025-03-16 18:21:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:32,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759013345] [2025-03-16 18:21:32,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:32,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:32,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 18:21:32,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 18:21:32,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:32,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759013345] [2025-03-16 18:21:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759013345] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:32,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:32,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 18:21:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867452509] [2025-03-16 18:21:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:32,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:21:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:32,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:21:32,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:21:32,709 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:21:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:32,722 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2025-03-16 18:21:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:21:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 18:21:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:32,727 INFO L225 Difference]: With dead ends: 42 [2025-03-16 18:21:32,729 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 18:21:32,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:21:32,734 INFO L435 NwaCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:32,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 18:21:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 18:21:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:21:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2025-03-16 18:21:32,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 7 [2025-03-16 18:21:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:32,762 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2025-03-16 18:21:32,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:21:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2025-03-16 18:21:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 18:21:32,763 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:32,763 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:32,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:21:32,764 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:32,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1330180005, now seen corresponding path program 1 times [2025-03-16 18:21:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204803581] [2025-03-16 18:21:32,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:32,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 18:21:32,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 18:21:32,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:32,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204803581] [2025-03-16 18:21:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204803581] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:32,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:32,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567190099] [2025-03-16 18:21:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:32,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:32,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:32,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:32,900 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:21:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:32,949 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2025-03-16 18:21:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 18:21:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:32,950 INFO L225 Difference]: With dead ends: 31 [2025-03-16 18:21:32,950 INFO L226 Difference]: Without dead ends: 29 [2025-03-16 18:21:32,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:32,951 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:32,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-16 18:21:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2025-03-16 18:21:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:21:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2025-03-16 18:21:32,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 7 [2025-03-16 18:21:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:32,958 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2025-03-16 18:21:32,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:21:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2025-03-16 18:21:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 18:21:32,958 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:32,958 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:32,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:21:32,959 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:32,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 733792983, now seen corresponding path program 1 times [2025-03-16 18:21:32,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:32,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082228755] [2025-03-16 18:21:32,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:32,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:32,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 18:21:32,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 18:21:32,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:32,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:33,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082228755] [2025-03-16 18:21:33,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082228755] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:33,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:33,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:33,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126268080] [2025-03-16 18:21:33,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:33,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:33,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:33,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:33,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:33,038 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:21:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:33,104 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-16 18:21:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-16 18:21:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:33,105 INFO L225 Difference]: With dead ends: 35 [2025-03-16 18:21:33,105 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 18:21:33,105 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:33,106 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:33,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 18:21:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2025-03-16 18:21:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:21:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2025-03-16 18:21:33,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 12 [2025-03-16 18:21:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:33,114 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2025-03-16 18:21:33,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:21:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2025-03-16 18:21:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 18:21:33,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:33,115 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:33,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:21:33,116 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:33,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 699336485, now seen corresponding path program 1 times [2025-03-16 18:21:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591950291] [2025-03-16 18:21:33,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:33,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:21:33,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:21:33,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:33,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085354599] [2025-03-16 18:21:33,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:33,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:33,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:21:33,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:21:33,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:21:33,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:33,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:21:33,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:21:33,266 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:21:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591950291] [2025-03-16 18:21:33,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:33,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085354599] [2025-03-16 18:21:33,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085354599] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:33,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:33,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704085120] [2025-03-16 18:21:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:33,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:33,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:33,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:33,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:33,268 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:21:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:33,327 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2025-03-16 18:21:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2025-03-16 18:21:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:33,328 INFO L225 Difference]: With dead ends: 50 [2025-03-16 18:21:33,328 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:21:33,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:33,329 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:33,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:33,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:21:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-16 18:21:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-16 18:21:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2025-03-16 18:21:33,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2025-03-16 18:21:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:33,336 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2025-03-16 18:21:33,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:21:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2025-03-16 18:21:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 18:21:33,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:33,337 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:33,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:21:33,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:33,538 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:33,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1540930980, now seen corresponding path program 1 times [2025-03-16 18:21:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:33,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602876062] [2025-03-16 18:21:33,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:33,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:21:33,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:21:33,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344102877] [2025-03-16 18:21:33,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:33,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:33,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:21:33,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:21:33,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:21:33,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:33,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:21:33,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 18:21:33,653 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:21:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602876062] [2025-03-16 18:21:33,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344102877] [2025-03-16 18:21:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344102877] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:33,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:33,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919059814] [2025-03-16 18:21:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:33,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:33,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:33,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:33,654 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:21:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:33,704 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2025-03-16 18:21:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-03-16 18:21:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:33,706 INFO L225 Difference]: With dead ends: 50 [2025-03-16 18:21:33,706 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 18:21:33,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:33,706 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:33,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 18:21:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2025-03-16 18:21:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:21:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2025-03-16 18:21:33,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 23 [2025-03-16 18:21:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:33,713 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2025-03-16 18:21:33,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:21:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2025-03-16 18:21:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 18:21:33,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:33,715 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:33,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:33,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:33,915 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:33,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2124795744, now seen corresponding path program 1 times [2025-03-16 18:21:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680587775] [2025-03-16 18:21:33,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:33,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:21:33,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:21:33,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:33,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987516957] [2025-03-16 18:21:33,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:33,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:33,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:21:33,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:21:33,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:21:33,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:33,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:33,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 18:21:33,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 18:21:34,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-16 18:21:34,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:34,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680587775] [2025-03-16 18:21:34,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:34,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987516957] [2025-03-16 18:21:34,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987516957] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:21:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-16 18:21:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563255532] [2025-03-16 18:21:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:34,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:34,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:34,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:21:34,134 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:21:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:34,359 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2025-03-16 18:21:34,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:34,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2025-03-16 18:21:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:34,361 INFO L225 Difference]: With dead ends: 56 [2025-03-16 18:21:34,361 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 18:21:34,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:21:34,363 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:34,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 18:21:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2025-03-16 18:21:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:21:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2025-03-16 18:21:34,372 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 33 [2025-03-16 18:21:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:34,373 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2025-03-16 18:21:34,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 18:21:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2025-03-16 18:21:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 18:21:34,373 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:34,373 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:34,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:21:34,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:34,578 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:34,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1439013148, now seen corresponding path program 1 times [2025-03-16 18:21:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:34,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715482733] [2025-03-16 18:21:34,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:34,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:21:34,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:21:34,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:34,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 18:21:34,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:34,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715482733] [2025-03-16 18:21:34,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715482733] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:34,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:34,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177188339] [2025-03-16 18:21:34,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:34,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:34,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:34,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:34,706 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 18:21:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:34,748 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2025-03-16 18:21:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2025-03-16 18:21:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:34,749 INFO L225 Difference]: With dead ends: 61 [2025-03-16 18:21:34,749 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:21:34,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:34,750 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:34,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:21:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-16 18:21:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:21:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2025-03-16 18:21:34,763 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 39 [2025-03-16 18:21:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:34,764 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2025-03-16 18:21:34,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 18:21:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2025-03-16 18:21:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 18:21:34,765 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:34,765 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:34,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 18:21:34,767 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:34,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2029649450, now seen corresponding path program 1 times [2025-03-16 18:21:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861231347] [2025-03-16 18:21:34,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:34,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 18:21:34,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:21:34,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:34,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616212169] [2025-03-16 18:21:34,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:34,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:34,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:21:34,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 18:21:34,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:21:34,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:34,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:34,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 18:21:34,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 18:21:35,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 18:21:35,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861231347] [2025-03-16 18:21:35,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616212169] [2025-03-16 18:21:35,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616212169] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:35,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:35,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-03-16 18:21:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022793332] [2025-03-16 18:21:35,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:35,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:21:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:35,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:21:35,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:21:35,871 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:21:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:36,324 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-03-16 18:21:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:21:36,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2025-03-16 18:21:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:36,326 INFO L225 Difference]: With dead ends: 115 [2025-03-16 18:21:36,326 INFO L226 Difference]: Without dead ends: 94 [2025-03-16 18:21:36,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:21:36,327 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:36,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 148 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-16 18:21:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2025-03-16 18:21:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.28) internal successors, (64), 55 states have internal predecessors, (64), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:21:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2025-03-16 18:21:36,359 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 51 [2025-03-16 18:21:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:36,360 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2025-03-16 18:21:36,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:21:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2025-03-16 18:21:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 18:21:36,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:36,363 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:36,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:36,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:36,563 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:36,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1070930246, now seen corresponding path program 1 times [2025-03-16 18:21:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8565608] [2025-03-16 18:21:36,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:36,569 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 18:21:36,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 18:21:36,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:36,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:36,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805235074] [2025-03-16 18:21:36,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:36,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:36,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:36,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:21:36,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 18:21:36,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 18:21:36,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:36,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:36,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 18:21:36,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-16 18:21:36,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-16 18:21:37,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8565608] [2025-03-16 18:21:37,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805235074] [2025-03-16 18:21:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805235074] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:37,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2025-03-16 18:21:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149707572] [2025-03-16 18:21:37,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:37,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:21:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:37,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:21:37,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:21:37,190 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2025-03-16 18:21:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:37,570 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2025-03-16 18:21:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:21:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 62 [2025-03-16 18:21:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:37,571 INFO L225 Difference]: With dead ends: 141 [2025-03-16 18:21:37,571 INFO L226 Difference]: Without dead ends: 114 [2025-03-16 18:21:37,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:21:37,572 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:37,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:21:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-16 18:21:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2025-03-16 18:21:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-16 18:21:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2025-03-16 18:21:37,592 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 62 [2025-03-16 18:21:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:37,592 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2025-03-16 18:21:37,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2025-03-16 18:21:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2025-03-16 18:21:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 18:21:37,595 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:37,595 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:37,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:37,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:37,796 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:37,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1148385514, now seen corresponding path program 1 times [2025-03-16 18:21:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:37,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079173682] [2025-03-16 18:21:37,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:37,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:37,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:21:37,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:21:37,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:37,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:38,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079173682] [2025-03-16 18:21:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079173682] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247257305] [2025-03-16 18:21:38,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:38,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:38,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:38,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:21:38,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:21:38,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:21:38,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:38,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:38,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 18:21:38,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:38,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247257305] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:38,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:21:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2025-03-16 18:21:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209254964] [2025-03-16 18:21:38,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:38,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:21:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:38,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:21:38,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:21:38,712 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 10 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2025-03-16 18:21:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:38,930 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2025-03-16 18:21:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:21:38,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 10 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 67 [2025-03-16 18:21:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:38,931 INFO L225 Difference]: With dead ends: 109 [2025-03-16 18:21:38,931 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 18:21:38,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:21:38,932 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:38,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 219 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:21:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 18:21:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-16 18:21:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:21:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2025-03-16 18:21:38,944 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 67 [2025-03-16 18:21:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:38,945 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2025-03-16 18:21:38,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 10 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2025-03-16 18:21:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2025-03-16 18:21:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 18:21:38,946 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:38,946 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:38,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:39,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:39,146 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:39,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1657828488, now seen corresponding path program 2 times [2025-03-16 18:21:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:39,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195096871] [2025-03-16 18:21:39,147 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:39,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 18:21:39,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:39,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:39,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308597348] [2025-03-16 18:21:39,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:39,180 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:21:39,203 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 18:21:39,223 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:39,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:39,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:39,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 18:21:39,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-16 18:21:39,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-16 18:21:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:45,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195096871] [2025-03-16 18:21:45,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:45,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308597348] [2025-03-16 18:21:45,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308597348] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:45,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:45,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2025-03-16 18:21:45,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635177742] [2025-03-16 18:21:45,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:45,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:21:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:45,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:21:45,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:21:45,470 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-16 18:21:51,440 WARN L286 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 18:21:53,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:21:55,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:21:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:56,690 INFO L93 Difference]: Finished difference Result 171 states and 234 transitions. [2025-03-16 18:21:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 18:21:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 79 [2025-03-16 18:21:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:56,691 INFO L225 Difference]: With dead ends: 171 [2025-03-16 18:21:56,691 INFO L226 Difference]: Without dead ends: 141 [2025-03-16 18:21:56,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:21:56,692 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:56,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 278 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2025-03-16 18:21:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-16 18:21:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2025-03-16 18:21:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 81 states have internal predecessors, (91), 49 states have call successors, (49), 14 states have call predecessors, (49), 14 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2025-03-16 18:21:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2025-03-16 18:21:56,715 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 79 [2025-03-16 18:21:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:56,715 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2025-03-16 18:21:56,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-16 18:21:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2025-03-16 18:21:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-16 18:21:56,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:56,716 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:56,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:56,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:56,920 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:56,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1995727700, now seen corresponding path program 2 times [2025-03-16 18:21:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:56,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509199882] [2025-03-16 18:21:56,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:56,930 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 90 statements into 2 equivalence classes. [2025-03-16 18:21:56,956 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 18:21:56,959 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:56,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590642195] [2025-03-16 18:21:56,960 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:56,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:56,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:21:56,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:21:56,989 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 90 statements into 2 equivalence classes. [2025-03-16 18:21:57,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 18:21:57,012 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:57,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:57,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 18:21:57,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-03-16 18:21:57,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-03-16 18:21:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509199882] [2025-03-16 18:21:58,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590642195] [2025-03-16 18:21:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590642195] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:58,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2025-03-16 18:21:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472148746] [2025-03-16 18:21:58,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:58,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 18:21:58,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:58,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 18:21:58,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:21:58,647 INFO L87 Difference]: Start difference. First operand 137 states and 188 transitions. Second operand has 27 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2025-03-16 18:22:02,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:22:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:03,849 INFO L93 Difference]: Finished difference Result 208 states and 294 transitions. [2025-03-16 18:22:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 18:22:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 90 [2025-03-16 18:22:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:03,851 INFO L225 Difference]: With dead ends: 208 [2025-03-16 18:22:03,851 INFO L226 Difference]: Without dead ends: 171 [2025-03-16 18:22:03,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 18:22:03,852 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:03,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 358 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2025-03-16 18:22:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-16 18:22:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 141. [2025-03-16 18:22:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 76 states have (on average 1.25) internal successors, (95), 84 states have internal predecessors, (95), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2025-03-16 18:22:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2025-03-16 18:22:03,893 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 90 [2025-03-16 18:22:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:03,893 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2025-03-16 18:22:03,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2025-03-16 18:22:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2025-03-16 18:22:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-16 18:22:03,894 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:22:03,894 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:03,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 18:22:04,098 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,SelfDestructingSolverStorable11 [2025-03-16 18:22:04,098 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:22:04,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:22:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2119161288, now seen corresponding path program 2 times [2025-03-16 18:22:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:22:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023353754] [2025-03-16 18:22:04,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:22:04,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:22:04,102 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-16 18:22:04,116 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 18:22:04,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:22:04,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-16 18:22:04,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:22:04,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023353754] [2025-03-16 18:22:04,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023353754] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:04,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381410380] [2025-03-16 18:22:04,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:22:04,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:22:04,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:22:04,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:22:04,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:22:04,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-16 18:22:04,622 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 18:22:04,622 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:22:04,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:04,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 18:22:04,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:22:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-16 18:22:04,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:22:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-16 18:22:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381410380] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:22:05,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:22:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 22 [2025-03-16 18:22:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500771239] [2025-03-16 18:22:05,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:22:05,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 18:22:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:22:05,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 18:22:05,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:22:05,322 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 16 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2025-03-16 18:22:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:05,779 INFO L93 Difference]: Finished difference Result 199 states and 263 transitions. [2025-03-16 18:22:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 18:22:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 16 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) Word has length 95 [2025-03-16 18:22:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:05,781 INFO L225 Difference]: With dead ends: 199 [2025-03-16 18:22:05,781 INFO L226 Difference]: Without dead ends: 116 [2025-03-16 18:22:05,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 18:22:05,782 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:05,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 393 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:22:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-16 18:22:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2025-03-16 18:22:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 71 states have internal predecessors, (76), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2025-03-16 18:22:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2025-03-16 18:22:05,808 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 95 [2025-03-16 18:22:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:05,808 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2025-03-16 18:22:05,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 16 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2025-03-16 18:22:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2025-03-16 18:22:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-16 18:22:05,809 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:22:05,809 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:05,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 18:22:06,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 18:22:06,010 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:22:06,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:22:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 359197208, now seen corresponding path program 1 times [2025-03-16 18:22:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:22:06,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640007229] [2025-03-16 18:22:06,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:22:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:22:06,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-03-16 18:22:06,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-03-16 18:22:06,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:22:06,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 22 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-16 18:22:06,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:22:06,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640007229] [2025-03-16 18:22:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640007229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:06,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240600982] [2025-03-16 18:22:06,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:22:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:22:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:22:06,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:22:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:22:06,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-03-16 18:22:06,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-03-16 18:22:06,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:22:06,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:06,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:22:06,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:22:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-16 18:22:06,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:22:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-16 18:22:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240600982] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:22:06,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:22:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2025-03-16 18:22:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565757627] [2025-03-16 18:22:06,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:22:06,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:22:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:22:06,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:22:06,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:22:06,368 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2025-03-16 18:22:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:06,453 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2025-03-16 18:22:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:22:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 106 [2025-03-16 18:22:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:06,455 INFO L225 Difference]: With dead ends: 122 [2025-03-16 18:22:06,455 INFO L226 Difference]: Without dead ends: 115 [2025-03-16 18:22:06,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 205 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:22:06,455 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:06,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 140 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:22:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-16 18:22:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2025-03-16 18:22:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 69 states have internal predecessors, (74), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:22:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2025-03-16 18:22:06,480 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 106 [2025-03-16 18:22:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:06,481 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2025-03-16 18:22:06,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2025-03-16 18:22:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2025-03-16 18:22:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-16 18:22:06,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:22:06,482 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:06,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 18:22:06,683 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,SelfDestructingSolverStorable13 [2025-03-16 18:22:06,683 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:22:06,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:22:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1221662138, now seen corresponding path program 3 times [2025-03-16 18:22:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:22:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313904745] [2025-03-16 18:22:06,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:22:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:22:06,688 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 10 equivalence classes. [2025-03-16 18:22:06,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 91 of 107 statements. [2025-03-16 18:22:06,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-16 18:22:06,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 51 proven. 24 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-16 18:22:07,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:22:07,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313904745] [2025-03-16 18:22:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313904745] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:07,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446500073] [2025-03-16 18:22:07,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:22:07,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:22:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:22:07,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:22:07,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 18:22:07,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 10 equivalence classes. [2025-03-16 18:22:07,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 42 of 107 statements. [2025-03-16 18:22:07,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:22:07,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:07,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 18:22:07,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:22:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2025-03-16 18:22:07,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:22:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446500073] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:08,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:22:08,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2025-03-16 18:22:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384112372] [2025-03-16 18:22:08,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:22:08,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 18:22:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:22:08,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 18:22:08,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:22:08,039 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2025-03-16 18:22:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:08,550 INFO L93 Difference]: Finished difference Result 192 states and 240 transitions. [2025-03-16 18:22:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 18:22:08,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 107 [2025-03-16 18:22:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:08,551 INFO L225 Difference]: With dead ends: 192 [2025-03-16 18:22:08,551 INFO L226 Difference]: Without dead ends: 115 [2025-03-16 18:22:08,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 18:22:08,552 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:08,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 296 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:22:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-16 18:22:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2025-03-16 18:22:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.09375) internal successors, (70), 68 states have internal predecessors, (70), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:22:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2025-03-16 18:22:08,590 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 107 [2025-03-16 18:22:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:08,590 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2025-03-16 18:22:08,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2025-03-16 18:22:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2025-03-16 18:22:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-16 18:22:08,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:22:08,591 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:08,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 18:22:08,795 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,SelfDestructingSolverStorable14 [2025-03-16 18:22:08,795 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:22:08,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:22:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -75991487, now seen corresponding path program 2 times [2025-03-16 18:22:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:22:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569004513] [2025-03-16 18:22:08,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:22:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:22:08,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-16 18:22:08,822 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 18:22:08,822 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:22:08,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:22:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965683016] [2025-03-16 18:22:08,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:22:08,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:22:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:22:08,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:22:08,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 18:22:08,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-16 18:22:08,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 18:22:08,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:22:08,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:08,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-16 18:22:08,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:22:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 116 proven. 77 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2025-03-16 18:22:09,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:22:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:22:09,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569004513] [2025-03-16 18:22:09,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:22:09,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965683016] [2025-03-16 18:22:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965683016] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:09,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:22:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-03-16 18:22:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313873106] [2025-03-16 18:22:09,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:22:09,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 18:22:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:22:09,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 18:22:09,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:22:09,794 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-16 18:22:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:10,067 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2025-03-16 18:22:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 18:22:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 118 [2025-03-16 18:22:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:10,069 INFO L225 Difference]: With dead ends: 152 [2025-03-16 18:22:10,069 INFO L226 Difference]: Without dead ends: 100 [2025-03-16 18:22:10,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:22:10,069 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:10,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:22:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-16 18:22:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2025-03-16 18:22:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0) internal successors, (62), 62 states have internal predecessors, (62), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2025-03-16 18:22:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2025-03-16 18:22:10,089 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 118 [2025-03-16 18:22:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:10,089 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2025-03-16 18:22:10,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-16 18:22:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2025-03-16 18:22:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-03-16 18:22:10,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:22:10,090 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:10,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 18:22:10,290 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,SelfDestructingSolverStorable15 [2025-03-16 18:22:10,291 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:22:10,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:22:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2012450555, now seen corresponding path program 1 times [2025-03-16 18:22:10,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:22:10,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558710201] [2025-03-16 18:22:10,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:22:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:22:10,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 123 statements into 1 equivalence classes. [2025-03-16 18:22:10,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 123 of 123 statements. [2025-03-16 18:22:10,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:22:10,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 42 proven. 45 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2025-03-16 18:22:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:22:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558710201] [2025-03-16 18:22:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558710201] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:22:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546459528] [2025-03-16 18:22:10,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:22:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:22:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:22:10,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:22:10,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 18:22:10,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 123 statements into 1 equivalence classes. [2025-03-16 18:22:10,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 123 of 123 statements. [2025-03-16 18:22:10,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:22:10,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:22:10,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 18:22:10,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:22:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 41 proven. 106 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2025-03-16 18:22:10,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:22:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 41 proven. 106 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2025-03-16 18:22:11,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546459528] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:22:11,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:22:11,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 31 [2025-03-16 18:22:11,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704863253] [2025-03-16 18:22:11,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:22:11,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 18:22:11,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:22:11,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 18:22:11,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2025-03-16 18:22:11,420 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 31 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 19 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 17 states have call predecessors, (60), 19 states have call successors, (60) [2025-03-16 18:22:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:22:11,781 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2025-03-16 18:22:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:22:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 19 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 17 states have call predecessors, (60), 19 states have call successors, (60) Word has length 123 [2025-03-16 18:22:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:22:11,782 INFO L225 Difference]: With dead ends: 112 [2025-03-16 18:22:11,782 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 18:22:11,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:22:11,783 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:22:11,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 378 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:22:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 18:22:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 18:22:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:22:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 18:22:11,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 123 [2025-03-16 18:22:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:22:11,784 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 18:22:11,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 19 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 17 states have call predecessors, (60), 19 states have call successors, (60) [2025-03-16 18:22:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 18:22:11,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 18:22:11,786 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:22:11,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 18:22:11,987 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,SelfDestructingSolverStorable16 [2025-03-16 18:22:11,989 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:22:11,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 18:22:12,810 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:22:12,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:22:12 BoogieIcfgContainer [2025-03-16 18:22:12,821 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:22:12,821 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:22:12,821 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:22:12,822 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:22:12,822 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:32" (3/4) ... [2025-03-16 18:22:12,824 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 18:22:12,828 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 18:22:12,832 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2025-03-16 18:22:12,832 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-03-16 18:22:12,832 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-16 18:22:12,832 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:22:12,832 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:22:12,889 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:22:12,890 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:22:12,890 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:22:12,890 INFO L158 Benchmark]: Toolchain (without parser) took 40784.92ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 112.4MB in the beginning and 301.3MB in the end (delta: -188.9MB). Peak memory consumption was 196.9MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,890 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 121.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.53ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 101.3MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.92ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 100.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: Boogie Preprocessor took 17.13ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.8MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: IcfgBuilder took 216.07ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 87.1MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: TraceAbstraction took 40319.44ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 86.1MB in the beginning and 117.0MB in the end (delta: -30.9MB). Peak memory consumption was 172.4MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,891 INFO L158 Benchmark]: Witness Printer took 68.44ms. Allocated memory is still 335.5MB. Free memory was 117.0MB in the beginning and 301.3MB in the end (delta: -184.3MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2025-03-16 18:22:12,892 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 121.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 142.53ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 101.3MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.92ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 100.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.13ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.8MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 216.07ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 87.1MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 40319.44ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 86.1MB in the beginning and 117.0MB in the end (delta: -30.9MB). Peak memory consumption was 172.4MB. Max. memory is 16.1GB. * Witness Printer took 68.44ms. Allocated memory is still 335.5MB. Free memory was 117.0MB in the beginning and 301.3MB in the end (delta: -184.3MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 41 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.4s, OverallIterations: 17, TraceHistogramMax: 22, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 299 SdHoareTripleChecker+Valid, 10.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 245 mSDsluCounter, 3134 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2685 mSDsCounter, 505 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4458 IncrementalHoareTripleChecker+Invalid, 4963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 505 mSolverCounterUnsat, 449 mSDtfsCounter, 4458 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1826 GetRequests, 1533 SyntacticMatches, 13 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 12.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=12, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 81 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 2007 NumberOfCodeBlocks, 1926 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 2209 ConstructedInterpolants, 0 QuantifiedInterpolants, 19667 SizeOfPredicates, 27 NumberOfNonLiveVariables, 2453 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 11090/11937 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Location Invariant Derived location invariant: ((((((((((p == 4) && (q == 0)) && (A == r)) && (d == 4)) && (A <= 5)) && (B == 1)) && (0 <= A)) || (((((((p == 8) && (d == 8)) && (q == 0)) && (A == r)) && (A <= 5)) && (B == 1)) && (4 <= r))) || (((((((2 == p) && (q == 0)) && (A == r)) && (A <= 5)) && (B == 1)) && (0 <= A)) && (2 == d))) || (((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (A <= 5)) && (B == 1)) && (0 <= A))) - InvariantResult [Line: 22]: Location Invariant Derived location invariant: ((((((((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || ((((((d == 1) && (p == 1)) && (A == ((long long) q + r))) && (A <= 5)) && (B == 1)) && (0 <= A))) || (((((((p == 8) && (d == 8)) && (q == 0)) && (A == r)) && (A <= 5)) && (B == 1)) && (4 <= r))) || (((((((p == 4) && (A == ((long long) r + 4))) && (0 <= r)) && (q == 4)) && (d == 4)) && (A <= 5)) && (B == 1))) || (((((((p == 4) && (q == 0)) && (r <= 3)) && (A == r)) && (d == 4)) && (B == 1)) && (0 <= A))) || (((((((A <= 3) && (2 == p)) && (2 == q)) && (((long long) 2 + r) == A)) && (B == 1)) && (0 <= A)) && (2 == d))) || (((((((2 == p) && (q == 0)) && (A == r)) && (A <= 5)) && (B == 1)) && (0 <= A)) && (2 == d))) || (((((((A == ((long long) r + 4)) && (4 <= A)) && (2 == p)) && (q == 4)) && (A <= 5)) && (B == 1)) && (2 == d))) RESULT: Ultimate proved your program to be correct! [2025-03-16 18:22:12,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE