./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.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/array-programs/partial_mod_count_limited_2.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 d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:38:08,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:38:08,498 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:38:08,501 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:38:08,502 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:38:08,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:38:08,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:38:08,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:38:08,516 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:38:08,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:38:08,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:38:08,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:38:08,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:38:08,517 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:38:08,517 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:38:08,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:38:08,518 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 -> d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 [2025-03-16 13:38:08,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:38:08,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:38:08,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:38:08,757 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:38:08,757 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:38:08,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2025-03-16 13:38:09,849 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aae86fc/8cddfada30f74282ac07624020738463/FLAG28a154708 [2025-03-16 13:38:10,039 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:38:10,040 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2025-03-16 13:38:10,047 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aae86fc/8cddfada30f74282ac07624020738463/FLAG28a154708 [2025-03-16 13:38:10,082 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aae86fc/8cddfada30f74282ac07624020738463 [2025-03-16 13:38:10,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:38:10,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:38:10,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:38:10,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:38:10,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:38:10,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44205c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10, skipping insertion in model container [2025-03-16 13:38:10,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:38:10,202 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/array-programs/partial_mod_count_limited_2.c[331,344] [2025-03-16 13:38:10,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:38:10,226 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:38:10,233 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/array-programs/partial_mod_count_limited_2.c[331,344] [2025-03-16 13:38:10,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:38:10,250 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:38:10,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10 WrapperNode [2025-03-16 13:38:10,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:38:10,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:38:10,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:38:10,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:38:10,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,276 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2025-03-16 13:38:10,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:38:10,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:38:10,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:38:10,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:38:10,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,297 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-16 13:38:10,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,303 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:38:10,308 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:38:10,308 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:38:10,309 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:38:10,309 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (1/1) ... [2025-03-16 13:38:10,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:38:10,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:10,332 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 13:38:10,334 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 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:38:10,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:38:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:38:10,398 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:38:10,400 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:38:10,502 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L12: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:38:10,512 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:38:10,512 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:38:10,518 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:38:10,518 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:38:10,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:38:10 BoogieIcfgContainer [2025-03-16 13:38:10,519 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:38:10,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:38:10,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:38:10,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:38:10,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:38:10" (1/3) ... [2025-03-16 13:38:10,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d593826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:38:10, skipping insertion in model container [2025-03-16 13:38:10,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:38:10" (2/3) ... [2025-03-16 13:38:10,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d593826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:38:10, skipping insertion in model container [2025-03-16 13:38:10,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:38:10" (3/3) ... [2025-03-16 13:38:10,525 INFO L128 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2025-03-16 13:38:10,535 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:38:10,536 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG partial_mod_count_limited_2.c that has 1 procedures, 18 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 13:38:10,574 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:38:10,581 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;@65169767, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:38:10,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:38:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 13:38:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:38:10,588 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:10,588 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:10,588 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:10,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 902650163, now seen corresponding path program 1 times [2025-03-16 13:38:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:10,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569084752] [2025-03-16 13:38:10,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:10,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:38:10,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:38:10,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:10,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:10,725 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 13:38:10,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:10,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569084752] [2025-03-16 13:38:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569084752] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:38:10,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:38:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:38:10,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481957625] [2025-03-16 13:38:10,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:38:10,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:38:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:10,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:38:10,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:38:10,744 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:10,751 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2025-03-16 13:38:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:38:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:38:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:10,756 INFO L225 Difference]: With dead ends: 34 [2025-03-16 13:38:10,756 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 13:38:10,757 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 13:38:10,759 INFO L435 NwaCegarLoop]: 22 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, 22 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 13:38:10,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:38:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 13:38:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-16 13:38:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 13:38:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2025-03-16 13:38:10,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2025-03-16 13:38:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:10,777 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2025-03-16 13:38:10,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2025-03-16 13:38:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:38:10,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:10,778 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:10,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:38:10,778 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:10,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1649506798, now seen corresponding path program 1 times [2025-03-16 13:38:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327668329] [2025-03-16 13:38:10,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:10,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:10,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:38:10,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:38:10,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:10,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:10,918 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 13:38:10,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327668329] [2025-03-16 13:38:10,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327668329] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:38:10,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:38:10,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:38:10,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468053552] [2025-03-16 13:38:10,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:38:10,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:38:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:10,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:38:10,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:38:10,920 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:10,959 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-03-16 13:38:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:38:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:38:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:10,960 INFO L225 Difference]: With dead ends: 39 [2025-03-16 13:38:10,960 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 13:38:10,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:38:10,961 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:10,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:38:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 13:38:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2025-03-16 13:38:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 13:38:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-16 13:38:10,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2025-03-16 13:38:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:10,967 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-16 13:38:10,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-16 13:38:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 13:38:10,968 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:10,968 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:10,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:38:10,969 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:10,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1419639048, now seen corresponding path program 1 times [2025-03-16 13:38:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053693136] [2025-03-16 13:38:10,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:10,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 13:38:10,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:38:10,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:10,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:11,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053693136] [2025-03-16 13:38:11,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053693136] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:11,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827448565] [2025-03-16 13:38:11,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:11,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:11,106 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 13:38:11,118 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 13:38:11,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 13:38:11,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:38:11,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:11,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:11,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:38:11,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:11,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:11,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827448565] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:11,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-16 13:38:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704085120] [2025-03-16 13:38:11,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:11,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:38:11,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:11,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:38:11,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:38:11,293 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 13:38:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:11,431 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2025-03-16 13:38:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:38:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 13:38:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:11,432 INFO L225 Difference]: With dead ends: 65 [2025-03-16 13:38:11,432 INFO L226 Difference]: Without dead ends: 53 [2025-03-16 13:38:11,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:38:11,433 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:11,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:38:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-16 13:38:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2025-03-16 13:38:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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 13:38:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2025-03-16 13:38:11,441 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 14 [2025-03-16 13:38:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:11,441 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2025-03-16 13:38:11,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 13:38:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2025-03-16 13:38:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 13:38:11,442 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:11,442 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:11,447 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 13:38:11,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:11,644 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:11,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash -756401614, now seen corresponding path program 1 times [2025-03-16 13:38:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984367718] [2025-03-16 13:38:11,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:11,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:11,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 13:38:11,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 13:38:11,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:11,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:11,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984367718] [2025-03-16 13:38:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984367718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649627520] [2025-03-16 13:38:11,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:11,984 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 13:38:11,985 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 13:38:12,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 13:38:12,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 13:38:12,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:12,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:12,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 13:38:12,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:12,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649627520] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:12,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:12,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-03-16 13:38:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231108333] [2025-03-16 13:38:12,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:12,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:38:12,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:12,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:38:12,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:38:12,279 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 13:38:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:12,485 INFO L93 Difference]: Finished difference Result 141 states and 181 transitions. [2025-03-16 13:38:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:38:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-16 13:38:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:12,487 INFO L225 Difference]: With dead ends: 141 [2025-03-16 13:38:12,488 INFO L226 Difference]: Without dead ends: 125 [2025-03-16 13:38:12,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:38:12,489 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 393 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:12,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 83 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:38:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-16 13:38:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 61. [2025-03-16 13:38:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3) internal successors, (78), 60 states have internal predecessors, (78), 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 13:38:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2025-03-16 13:38:12,501 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 29 [2025-03-16 13:38:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:12,501 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2025-03-16 13:38:12,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 13:38:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2025-03-16 13:38:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 13:38:12,502 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:12,502 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:12,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:38:12,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:38:12,704 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:12,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1156127347, now seen corresponding path program 2 times [2025-03-16 13:38:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:12,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057394376] [2025-03-16 13:38:12,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:38:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:12,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-16 13:38:12,750 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 13:38:12,750 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:38:12,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 129 proven. 60 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-16 13:38:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057394376] [2025-03-16 13:38:13,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057394376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532451206] [2025-03-16 13:38:13,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:38:13,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:13,207 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 13:38:13,209 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 13:38:13,260 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-16 13:38:13,284 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 59 statements. [2025-03-16 13:38:13,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 13:38:13,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:13,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:38:13,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-16 13:38:13,592 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:38:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532451206] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:38:13,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:38:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2025-03-16 13:38:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936651881] [2025-03-16 13:38:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:38:13,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:38:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:13,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:38:13,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:38:13,593 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:13,661 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2025-03-16 13:38:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:38:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-03-16 13:38:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:13,662 INFO L225 Difference]: With dead ends: 73 [2025-03-16 13:38:13,662 INFO L226 Difference]: Without dead ends: 71 [2025-03-16 13:38:13,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:38:13,663 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:13,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:38:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-16 13:38:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-03-16 13:38:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 70 states have internal predecessors, (90), 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 13:38:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2025-03-16 13:38:13,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 59 [2025-03-16 13:38:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:13,670 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2025-03-16 13:38:13,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2025-03-16 13:38:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 13:38:13,671 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:13,671 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:13,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:38:13,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:13,872 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:13,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1189165094, now seen corresponding path program 1 times [2025-03-16 13:38:13,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:13,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562342935] [2025-03-16 13:38:13,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:13,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:13,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 13:38:13,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 13:38:13,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:13,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 121 proven. 87 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:38:14,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562342935] [2025-03-16 13:38:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562342935] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893665833] [2025-03-16 13:38:14,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:38:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:14,352 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 13:38:14,353 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 13:38:14,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 13:38:14,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 13:38:14,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:38:14,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:14,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:38:14,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:38:14,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:38:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893665833] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:14,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2025-03-16 13:38:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109344384] [2025-03-16 13:38:14,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:14,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:38:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:14,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:38:14,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=667, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:38:14,968 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 32 states have internal predecessors, (154), 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 13:38:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:15,540 INFO L93 Difference]: Finished difference Result 521 states and 649 transitions. [2025-03-16 13:38:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 13:38:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2025-03-16 13:38:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:15,544 INFO L225 Difference]: With dead ends: 521 [2025-03-16 13:38:15,545 INFO L226 Difference]: Without dead ends: 480 [2025-03-16 13:38:15,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=686, Invalid=1206, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:38:15,546 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 775 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:15,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 184 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:38:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2025-03-16 13:38:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 131. [2025-03-16 13:38:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 130 states have internal predecessors, (168), 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 13:38:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2025-03-16 13:38:15,567 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 64 [2025-03-16 13:38:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:15,568 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2025-03-16 13:38:15,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 32 states have internal predecessors, (154), 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 13:38:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2025-03-16 13:38:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-16 13:38:15,568 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:15,568 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:15,574 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 13:38:15,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:15,769 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:15,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -345303238, now seen corresponding path program 2 times [2025-03-16 13:38:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130847127] [2025-03-16 13:38:15,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:38:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:15,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-16 13:38:15,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 13:38:15,816 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:38:15,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 615 proven. 297 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2025-03-16 13:38:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130847127] [2025-03-16 13:38:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130847127] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237520877] [2025-03-16 13:38:16,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:38:16,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:16,591 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 13:38:16,593 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 13:38:16,645 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-16 13:38:16,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 13:38:16,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:38:16,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:16,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 13:38:16,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:38:17,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:38:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237520877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:17,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:17,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 61 [2025-03-16 13:38:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366104750] [2025-03-16 13:38:17,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:17,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-16 13:38:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:18,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-16 13:38:18,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=2388, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 13:38:18,001 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 62 states, 62 states have (on average 4.82258064516129) internal successors, (299), 61 states have internal predecessors, (299), 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 13:38:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:19,339 INFO L93 Difference]: Finished difference Result 1079 states and 1345 transitions. [2025-03-16 13:38:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-16 13:38:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.82258064516129) internal successors, (299), 61 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2025-03-16 13:38:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:19,342 INFO L225 Difference]: With dead ends: 1079 [2025-03-16 13:38:19,342 INFO L226 Difference]: Without dead ends: 1008 [2025-03-16 13:38:19,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2567, Invalid=4573, Unknown=0, NotChecked=0, Total=7140 [2025-03-16 13:38:19,344 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 2091 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:19,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2091 Valid, 362 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:38:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2025-03-16 13:38:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 251. [2025-03-16 13:38:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.296) internal successors, (324), 250 states have internal predecessors, (324), 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 13:38:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 324 transitions. [2025-03-16 13:38:19,359 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 324 transitions. Word has length 124 [2025-03-16 13:38:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:19,360 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 324 transitions. [2025-03-16 13:38:19,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.82258064516129) internal successors, (299), 61 states have internal predecessors, (299), 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 13:38:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 324 transitions. [2025-03-16 13:38:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2025-03-16 13:38:19,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:19,362 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:19,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:38:19,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:19,566 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:19,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:19,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1442619910, now seen corresponding path program 3 times [2025-03-16 13:38:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722423766] [2025-03-16 13:38:19,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:38:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:19,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 244 statements into 47 equivalence classes. [2025-03-16 13:38:20,309 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) and asserted 164 of 244 statements. [2025-03-16 13:38:20,309 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2025-03-16 13:38:20,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 2576 proven. 1446 refuted. 0 times theorem prover too weak. 1203 trivial. 0 not checked. [2025-03-16 13:38:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722423766] [2025-03-16 13:38:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722423766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903194020] [2025-03-16 13:38:21,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:38:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:21,697 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 13:38:21,698 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 13:38:21,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 244 statements into 47 equivalence classes. [2025-03-16 13:38:21,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 244 statements. [2025-03-16 13:38:21,840 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:38:21,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:21,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 13:38:21,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2025-03-16 13:38:22,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2025-03-16 13:38:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903194020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:24,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:24,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6, 7] total 39 [2025-03-16 13:38:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325841795] [2025-03-16 13:38:24,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:24,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:38:24,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:24,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:38:24,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:38:24,887 INFO L87 Difference]: Start difference. First operand 251 states and 324 transitions. Second operand has 40 states, 40 states have (on average 4.325) internal successors, (173), 39 states have internal predecessors, (173), 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 13:38:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:42,363 INFO L93 Difference]: Finished difference Result 2511 states and 3407 transitions. [2025-03-16 13:38:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 351 states. [2025-03-16 13:38:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.325) internal successors, (173), 39 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2025-03-16 13:38:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:42,372 INFO L225 Difference]: With dead ends: 2511 [2025-03-16 13:38:42,373 INFO L226 Difference]: Without dead ends: 2494 [2025-03-16 13:38:42,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64808 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=26084, Invalid=106776, Unknown=0, NotChecked=0, Total=132860 [2025-03-16 13:38:42,386 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1280 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:42,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 329 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-16 13:38:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2025-03-16 13:38:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 1545. [2025-03-16 13:38:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 1.3808290155440415) internal successors, (2132), 1544 states have internal predecessors, (2132), 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 13:38:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2132 transitions. [2025-03-16 13:38:42,467 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2132 transitions. Word has length 244 [2025-03-16 13:38:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:42,467 INFO L471 AbstractCegarLoop]: Abstraction has 1545 states and 2132 transitions. [2025-03-16 13:38:42,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.325) internal successors, (173), 39 states have internal predecessors, (173), 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 13:38:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2132 transitions. [2025-03-16 13:38:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2025-03-16 13:38:42,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:42,472 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 24, 22, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:42,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:38:42,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:42,673 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:42,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1499616005, now seen corresponding path program 4 times [2025-03-16 13:38:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3307831] [2025-03-16 13:38:42,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:38:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:42,696 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 264 statements into 2 equivalence classes. [2025-03-16 13:38:42,730 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 264 of 264 statements. [2025-03-16 13:38:42,731 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:38:42,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 13:38:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3307831] [2025-03-16 13:38:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3307831] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493374286] [2025-03-16 13:38:45,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:38:45,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:45,767 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 13:38:45,768 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 13:38:45,852 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 264 statements into 2 equivalence classes. [2025-03-16 13:38:50,475 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 264 of 264 statements. [2025-03-16 13:38:50,475 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:38:50,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:50,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 13:38:50,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 13:38:51,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 13:38:53,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493374286] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:53,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:53,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2025-03-16 13:38:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549741802] [2025-03-16 13:38:53,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:53,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2025-03-16 13:38:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:53,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2025-03-16 13:38:53,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9171, Invalid=11709, Unknown=0, NotChecked=0, Total=20880 [2025-03-16 13:38:53,799 INFO L87 Difference]: Start difference. First operand 1545 states and 2132 transitions. Second operand has 145 states, 145 states have (on average 4.875862068965517) internal successors, (707), 144 states have internal predecessors, (707), 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 13:39:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:39:00,368 INFO L93 Difference]: Finished difference Result 9495 states and 12588 transitions. [2025-03-16 13:39:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2025-03-16 13:39:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 4.875862068965517) internal successors, (707), 144 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2025-03-16 13:39:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:39:00,389 INFO L225 Difference]: With dead ends: 9495 [2025-03-16 13:39:00,389 INFO L226 Difference]: Without dead ends: 8075 [2025-03-16 13:39:00,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13300 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2025-03-16 13:39:00,396 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 5024 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5024 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:39:00,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5024 Valid, 830 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:39:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2025-03-16 13:39:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 1895. [2025-03-16 13:39:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 1.371700105596621) internal successors, (2598), 1894 states have internal predecessors, (2598), 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 13:39:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2598 transitions. [2025-03-16 13:39:00,559 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2598 transitions. Word has length 264 [2025-03-16 13:39:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:39:00,559 INFO L471 AbstractCegarLoop]: Abstraction has 1895 states and 2598 transitions. [2025-03-16 13:39:00,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 4.875862068965517) internal successors, (707), 144 states have internal predecessors, (707), 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 13:39:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2598 transitions. [2025-03-16 13:39:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2025-03-16 13:39:00,568 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:39:00,568 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-16 13:39:00,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:39:00,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:39:00,769 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:39:00,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:39:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash -295806278, now seen corresponding path program 5 times [2025-03-16 13:39:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:39:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790374731] [2025-03-16 13:39:00,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:39:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:39:00,827 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 504 statements into 95 equivalence classes. [2025-03-16 13:39:07,674 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) and asserted 504 of 504 statements. [2025-03-16 13:39:07,675 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2025-03-16 13:39:07,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:39:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 11091 proven. 5499 refuted. 0 times theorem prover too weak. 5429 trivial. 0 not checked. [2025-03-16 13:39:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:39:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790374731] [2025-03-16 13:39:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790374731] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:39:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451797469] [2025-03-16 13:39:11,760 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:39:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:39:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:39:11,763 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 13:39:11,764 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 13:39:11,901 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 504 statements into 95 equivalence classes.