./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:31:25,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:31:25,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:31:25,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:31:25,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:31:25,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:31:25,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:31:25,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:31:25,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:31:25,135 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:31:25,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:31:25,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:31:25,136 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:31:25,137 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:31:25,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:31:25,138 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:31:25,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:31:25,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:31:25,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:31:25,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:31:25,140 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 -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2025-03-03 09:31:25,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:31:25,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:31:25,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:31:25,358 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:31:25,359 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:31:25,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-03 09:31:26,497 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccb4b85e9/284b056040174ef4a7188d620046113c/FLAG29d2d7585 [2025-03-03 09:31:26,707 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:31:26,707 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-03 09:31:26,712 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccb4b85e9/284b056040174ef4a7188d620046113c/FLAG29d2d7585 [2025-03-03 09:31:27,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccb4b85e9/284b056040174ef4a7188d620046113c [2025-03-03 09:31:27,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:31:27,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:31:27,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:31:27,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:31:27,070 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:31:27,071 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137c8116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27, skipping insertion in model container [2025-03-03 09:31:27,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,080 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:31:27,164 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-cav19/array_init_nondet_vars.c[413,426] [2025-03-03 09:31:27,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:31:27,178 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:31:27,184 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-cav19/array_init_nondet_vars.c[413,426] [2025-03-03 09:31:27,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:31:27,196 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:31:27,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27 WrapperNode [2025-03-03 09:31:27,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:31:27,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:31:27,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:31:27,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:31:27,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,214 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2025-03-03 09:31:27,214 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:31:27,215 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:31:27,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:31:27,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:31:27,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,221 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,228 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-03 09:31:27,228 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,232 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:31:27,240 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:31:27,240 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:31:27,240 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:31:27,241 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (1/1) ... [2025-03-03 09:31:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:31:27,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:27,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 09:31:27,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 09:31:27,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:31:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:31:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:31:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:31:27,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:31:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:31:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:31:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:31:27,339 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:31:27,341 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:31:27,449 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 09:31:27,457 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-03 09:31:27,457 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:31:27,462 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:31:27,462 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:31:27,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:31:27 BoogieIcfgContainer [2025-03-03 09:31:27,463 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:31:27,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:31:27,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:31:27,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:31:27,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:31:27" (1/3) ... [2025-03-03 09:31:27,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de99b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:31:27, skipping insertion in model container [2025-03-03 09:31:27,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:31:27" (2/3) ... [2025-03-03 09:31:27,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de99b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:31:27, skipping insertion in model container [2025-03-03 09:31:27,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:31:27" (3/3) ... [2025-03-03 09:31:27,470 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2025-03-03 09:31:27,481 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:31:27,482 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_nondet_vars.c that has 2 procedures, 21 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 09:31:27,519 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:31:27,528 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;@b4f09e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:31:27,528 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:31:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:31:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 09:31:27,536 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:27,536 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:27,536 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:27,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1966607330, now seen corresponding path program 1 times [2025-03-03 09:31:27,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:27,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450813968] [2025-03-03 09:31:27,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:27,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:27,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 09:31:27,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 09:31:27,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:27,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:31:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:27,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450813968] [2025-03-03 09:31:27,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450813968] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:27,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815737543] [2025-03-03 09:31:27,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:27,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:27,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:27,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:27,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:31:27,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 09:31:27,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 09:31:27,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:27,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:27,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 09:31:27,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:31:27,698 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:31:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815737543] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:31:27,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:31:27,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 09:31:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476600915] [2025-03-03 09:31:27,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:31:27,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 09:31:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:27,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 09:31:27,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:31:27,717 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 09:31:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:27,726 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-03-03 09:31:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 09:31:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-03 09:31:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:27,732 INFO L225 Difference]: With dead ends: 39 [2025-03-03 09:31:27,733 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 09:31:27,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:31:27,736 INFO L435 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:27,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 09:31:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-03 09:31:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:31:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-03 09:31:27,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2025-03-03 09:31:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:27,761 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-03 09:31:27,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 09:31:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-03 09:31:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 09:31:27,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:27,762 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:27,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:27,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 09:31:27,963 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:27,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -729355620, now seen corresponding path program 1 times [2025-03-03 09:31:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852767951] [2025-03-03 09:31:27,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:27,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 09:31:27,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 09:31:27,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:27,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:31:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852767951] [2025-03-03 09:31:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852767951] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:31:28,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:31:28,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 09:31:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071601974] [2025-03-03 09:31:28,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:31:28,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:31:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:28,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:31:28,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:31:28,096 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 09:31:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:28,132 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2025-03-03 09:31:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:31:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-03 09:31:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:28,133 INFO L225 Difference]: With dead ends: 32 [2025-03-03 09:31:28,133 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 09:31:28,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:31:28,134 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:28,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 09:31:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2025-03-03 09:31:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:31:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-03 09:31:28,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2025-03-03 09:31:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:28,138 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-03 09:31:28,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 09:31:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-03 09:31:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 09:31:28,139 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:28,139 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:28,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:31:28,139 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:28,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 824661310, now seen corresponding path program 1 times [2025-03-03 09:31:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:28,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951991835] [2025-03-03 09:31:28,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:28,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:28,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:31:28,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:31:28,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:28,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:31:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951991835] [2025-03-03 09:31:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951991835] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47588759] [2025-03-03 09:31:28,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:28,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:28,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:28,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:31:28,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:31:28,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:31:28,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:28,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:28,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 09:31:28,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:28,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:28,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:31:28,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:28,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:31:28,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:31:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:31:28,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47588759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:28,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:28,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2025-03-03 09:31:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103050139] [2025-03-03 09:31:28,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:28,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 09:31:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:28,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 09:31:28,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:31:28,969 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-03 09:31:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:29,139 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2025-03-03 09:31:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 09:31:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2025-03-03 09:31:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:29,140 INFO L225 Difference]: With dead ends: 39 [2025-03-03 09:31:29,140 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 09:31:29,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:31:29,141 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:29,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 151 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:31:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 09:31:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2025-03-03 09:31:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:31:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-03-03 09:31:29,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 25 [2025-03-03 09:31:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:29,158 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-03-03 09:31:29,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-03 09:31:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-03-03 09:31:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 09:31:29,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:29,159 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:29,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:29,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 09:31:29,363 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:29,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 273025901, now seen corresponding path program 1 times [2025-03-03 09:31:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:29,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501026457] [2025-03-03 09:31:29,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:29,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 09:31:29,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:31:29,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:29,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501026457] [2025-03-03 09:31:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501026457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952782839] [2025-03-03 09:31:29,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:31:29,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:29,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:29,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:29,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:31:29,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 09:31:29,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:31:29,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:29,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:29,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:31:29,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:29,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:29,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952782839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:29,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:29,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-03 09:31:29,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120495139] [2025-03-03 09:31:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:29,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:31:29,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:29,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:31:29,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:31:29,555 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 09:31:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:29,602 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2025-03-03 09:31:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:31:29,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2025-03-03 09:31:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:29,603 INFO L225 Difference]: With dead ends: 43 [2025-03-03 09:31:29,603 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 09:31:29,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:31:29,604 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:29,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 09:31:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2025-03-03 09:31:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:31:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 09:31:29,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2025-03-03 09:31:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:29,608 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 09:31:29,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 09:31:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 09:31:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 09:31:29,610 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:29,610 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:29,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:29,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:29,811 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:29,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1503268956, now seen corresponding path program 2 times [2025-03-03 09:31:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990170827] [2025-03-03 09:31:29,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:29,818 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:31:29,839 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:31:29,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:29,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990170827] [2025-03-03 09:31:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990170827] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132082492] [2025-03-03 09:31:30,160 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:30,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:30,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:30,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:30,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:31:30,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:31:30,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:31:30,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:30,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:30,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 09:31:30,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:30,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:30,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:31:30,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:31:30,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:30,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:31:30,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:31:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132082492] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:30,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:30,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2025-03-03 09:31:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423541468] [2025-03-03 09:31:30,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:30,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 09:31:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:30,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 09:31:30,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:31:30,651 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-03 09:31:34,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:31:38,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:31:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:38,897 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2025-03-03 09:31:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 09:31:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2025-03-03 09:31:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:38,902 INFO L225 Difference]: With dead ends: 59 [2025-03-03 09:31:38,902 INFO L226 Difference]: Without dead ends: 57 [2025-03-03 09:31:38,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2025-03-03 09:31:38,903 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:38,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 188 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-03-03 09:31:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-03 09:31:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2025-03-03 09:31:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2025-03-03 09:31:38,911 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 32 [2025-03-03 09:31:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:38,911 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2025-03-03 09:31:38,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-03 09:31:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2025-03-03 09:31:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:31:38,911 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:38,911 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:38,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:39,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:39,112 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:39,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 262345615, now seen corresponding path program 2 times [2025-03-03 09:31:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928419310] [2025-03-03 09:31:39,113 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:39,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-03 09:31:39,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:31:39,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:39,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928419310] [2025-03-03 09:31:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928419310] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547580088] [2025-03-03 09:31:39,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:39,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:39,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:31:39,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-03 09:31:39,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:31:39,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:39,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:39,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-03 09:31:39,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:39,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:31:39,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:31:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:31:39,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:39,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:31:39,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:31:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:39,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547580088] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:39,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2025-03-03 09:31:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835109294] [2025-03-03 09:31:39,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:39,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 09:31:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:39,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 09:31:39,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-03-03 09:31:39,888 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-03 09:31:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:40,257 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-03-03 09:31:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 09:31:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 35 [2025-03-03 09:31:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:40,259 INFO L225 Difference]: With dead ends: 59 [2025-03-03 09:31:40,259 INFO L226 Difference]: Without dead ends: 57 [2025-03-03 09:31:40,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 09:31:40,260 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:40,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 206 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:31:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-03 09:31:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2025-03-03 09:31:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2025-03-03 09:31:40,270 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 35 [2025-03-03 09:31:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:40,273 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2025-03-03 09:31:40,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-03 09:31:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2025-03-03 09:31:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-03 09:31:40,274 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:40,274 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:40,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:40,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:40,475 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:40,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1391788333, now seen corresponding path program 3 times [2025-03-03 09:31:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864784557] [2025-03-03 09:31:40,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:40,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:40,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-03-03 09:31:40,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 09:31:40,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 09:31:40,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:31:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864784557] [2025-03-03 09:31:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864784557] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305719236] [2025-03-03 09:31:40,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:40,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:31:40,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-03-03 09:31:40,857 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 09:31:40,857 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 09:31:40,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:40,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:31:40,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:40,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:31:40,994 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:31:40,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:31:41,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:31:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:31:41,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305719236] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:41,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:31:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2025-03-03 09:31:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220801193] [2025-03-03 09:31:41,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:41,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 09:31:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:41,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 09:31:41,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:31:41,123 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 09:31:42,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:31:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:42,610 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2025-03-03 09:31:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 09:31:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2025-03-03 09:31:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:42,611 INFO L225 Difference]: With dead ends: 64 [2025-03-03 09:31:42,611 INFO L226 Difference]: Without dead ends: 62 [2025-03-03 09:31:42,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-03-03 09:31:42,612 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:42,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 154 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 09:31:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-03 09:31:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2025-03-03 09:31:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2025-03-03 09:31:42,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 42 [2025-03-03 09:31:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:42,621 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2025-03-03 09:31:42,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 09:31:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2025-03-03 09:31:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 09:31:42,622 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:42,622 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:42,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 09:31:42,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:42,827 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:42,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -984426852, now seen corresponding path program 4 times [2025-03-03 09:31:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:42,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648299510] [2025-03-03 09:31:42,827 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:31:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:42,839 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-03 09:31:42,842 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 44 statements. [2025-03-03 09:31:42,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:31:42,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 09:31:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648299510] [2025-03-03 09:31:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648299510] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:42,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632479988] [2025-03-03 09:31:42,910 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:31:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:42,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:42,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:31:42,942 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-03 09:31:42,952 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 44 statements. [2025-03-03 09:31:42,952 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:31:42,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:42,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:31:42,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 09:31:43,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 09:31:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632479988] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:43,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:43,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 13 [2025-03-03 09:31:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928661027] [2025-03-03 09:31:43,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:43,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:31:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:43,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:31:43,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:31:43,054 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 09:31:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:43,107 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2025-03-03 09:31:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:31:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2025-03-03 09:31:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:43,108 INFO L225 Difference]: With dead ends: 72 [2025-03-03 09:31:43,108 INFO L226 Difference]: Without dead ends: 56 [2025-03-03 09:31:43,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:31:43,108 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:43,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-03 09:31:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2025-03-03 09:31:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2025-03-03 09:31:43,114 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 44 [2025-03-03 09:31:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:43,114 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2025-03-03 09:31:43,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 09:31:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2025-03-03 09:31:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 09:31:43,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:43,115 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:43,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:43,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:43,316 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:43,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -847174370, now seen corresponding path program 5 times [2025-03-03 09:31:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:43,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116822423] [2025-03-03 09:31:43,316 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:31:43,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:43,322 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-03-03 09:31:43,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 09:31:43,329 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 09:31:43,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:31:43,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116822423] [2025-03-03 09:31:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116822423] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906564130] [2025-03-03 09:31:43,630 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:31:43,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:43,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:43,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:31:43,662 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-03-03 09:31:43,676 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 09:31:43,677 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 09:31:43,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:43,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-03 09:31:43,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:43,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:43,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:31:43,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:44,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:31:44,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:31:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:31:44,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906564130] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:44,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:44,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2025-03-03 09:31:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367607060] [2025-03-03 09:31:44,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:44,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 09:31:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:44,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 09:31:44,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 09:31:44,221 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 09:31:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:44,498 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2025-03-03 09:31:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 09:31:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 45 [2025-03-03 09:31:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:44,498 INFO L225 Difference]: With dead ends: 71 [2025-03-03 09:31:44,499 INFO L226 Difference]: Without dead ends: 69 [2025-03-03 09:31:44,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:31:44,500 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:44,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:31:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-03 09:31:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2025-03-03 09:31:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2025-03-03 09:31:44,512 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 45 [2025-03-03 09:31:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:44,513 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2025-03-03 09:31:44,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 09:31:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2025-03-03 09:31:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 09:31:44,516 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:44,516 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:44,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:44,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-03 09:31:44,720 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:44,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 475538972, now seen corresponding path program 3 times [2025-03-03 09:31:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:44,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57080871] [2025-03-03 09:31:44,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:44,725 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-03-03 09:31:44,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 09:31:44,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:31:44,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:31:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57080871] [2025-03-03 09:31:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57080871] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434386774] [2025-03-03 09:31:45,022 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:45,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:45,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:31:45,057 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-03-03 09:31:45,076 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 09:31:45,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:31:45,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:45,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 09:31:45,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:45,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:31:45,199 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:31:45,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:31:45,265 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:31:45,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:31:45,339 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:31:45,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:31:45,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:31:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:31:45,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:45,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-03 09:31:45,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-03 09:31:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 09:31:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434386774] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:45,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:45,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 21 [2025-03-03 09:31:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40304891] [2025-03-03 09:31:45,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:45,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 09:31:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:45,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 09:31:45,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-03-03 09:31:45,565 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-03 09:31:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:45,793 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2025-03-03 09:31:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 09:31:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 46 [2025-03-03 09:31:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:45,794 INFO L225 Difference]: With dead ends: 62 [2025-03-03 09:31:45,794 INFO L226 Difference]: Without dead ends: 60 [2025-03-03 09:31:45,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-03-03 09:31:45,795 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:45,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 150 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:31:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-03 09:31:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2025-03-03 09:31:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2025-03-03 09:31:45,800 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2025-03-03 09:31:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:45,800 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2025-03-03 09:31:45,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-03 09:31:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2025-03-03 09:31:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-03 09:31:45,801 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:45,801 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:45,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:46,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 09:31:46,002 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:46,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash -942952563, now seen corresponding path program 6 times [2025-03-03 09:31:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:46,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094246981] [2025-03-03 09:31:46,003 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:31:46,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:46,009 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-03-03 09:31:46,022 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:31:46,022 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 09:31:46,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:31:46,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094246981] [2025-03-03 09:31:46,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094246981] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649537126] [2025-03-03 09:31:46,117 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:31:46,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:46,119 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:46,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 09:31:46,152 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-03-03 09:31:46,174 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:31:46,174 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 09:31:46,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:46,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 09:31:46,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:31:46,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:31:46,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649537126] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:46,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:46,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-03-03 09:31:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312479848] [2025-03-03 09:31:46,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:46,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:31:46,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:46,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:31:46,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:31:46,308 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 09:31:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:46,374 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2025-03-03 09:31:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:31:46,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2025-03-03 09:31:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:46,375 INFO L225 Difference]: With dead ends: 73 [2025-03-03 09:31:46,375 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 09:31:46,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:31:46,376 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:46,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 09:31:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2025-03-03 09:31:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2025-03-03 09:31:46,381 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 48 [2025-03-03 09:31:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:46,381 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2025-03-03 09:31:46,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 09:31:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2025-03-03 09:31:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 09:31:46,383 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:46,383 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:46,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:46,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-03 09:31:46,583 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:46,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2117412156, now seen corresponding path program 7 times [2025-03-03 09:31:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738879007] [2025-03-03 09:31:46,584 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:31:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:46,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:31:46,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:31:46,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:46,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:31:46,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738879007] [2025-03-03 09:31:46,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738879007] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593200000] [2025-03-03 09:31:46,908 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:31:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:46,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:46,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 09:31:46,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:31:46,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:31:46,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:31:46,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:46,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-03 09:31:46,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:47,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:31:47,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:31:47,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:31:47,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593200000] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:47,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:31:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2025-03-03 09:31:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574183062] [2025-03-03 09:31:47,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:47,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:31:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:47,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:31:47,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:31:47,351 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-03 09:31:51,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:31:55,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:31:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:55,599 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2025-03-03 09:31:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 09:31:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 52 [2025-03-03 09:31:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:55,600 INFO L225 Difference]: With dead ends: 56 [2025-03-03 09:31:55,600 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 09:31:55,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 09:31:55,601 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:55,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2025-03-03 09:31:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 09:31:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2025-03-03 09:31:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 09:31:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2025-03-03 09:31:55,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 52 [2025-03-03 09:31:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:55,606 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2025-03-03 09:31:55,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-03 09:31:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2025-03-03 09:31:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 09:31:55,607 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:55,607 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:55,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:55,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 09:31:55,808 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:55,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash -358264145, now seen corresponding path program 8 times [2025-03-03 09:31:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015752645] [2025-03-03 09:31:55,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:55,816 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-03 09:31:55,827 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 09:31:55,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:55,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:31:56,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015752645] [2025-03-03 09:31:56,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015752645] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557536075] [2025-03-03 09:31:56,125 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:31:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:56,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:56,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 09:31:56,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-03 09:31:56,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 09:31:56,175 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:31:56,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:56,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 09:31:56,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:56,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:56,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-03 09:31:56,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:56,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:31:56,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:31:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:31:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557536075] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:56,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:56,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 39 [2025-03-03 09:31:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349378621] [2025-03-03 09:31:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:56,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-03 09:31:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:56,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-03 09:31:56,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:31:56,863 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2025-03-03 09:31:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:57,396 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2025-03-03 09:31:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:31:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) Word has length 55 [2025-03-03 09:31:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:57,397 INFO L225 Difference]: With dead ends: 83 [2025-03-03 09:31:57,397 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 09:31:57,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 09:31:57,398 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:57,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 317 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:31:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 09:31:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2025-03-03 09:31:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2025-03-03 09:31:57,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 55 [2025-03-03 09:31:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:57,410 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2025-03-03 09:31:57,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2025-03-03 09:31:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2025-03-03 09:31:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-03 09:31:57,410 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:57,411 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:57,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:31:57,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 09:31:57,611 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:57,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -52540324, now seen corresponding path program 9 times [2025-03-03 09:31:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212433031] [2025-03-03 09:31:57,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:57,617 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 6 equivalence classes. [2025-03-03 09:31:57,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 09:31:57,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:31:57,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:31:57,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212433031] [2025-03-03 09:31:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212433031] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103689846] [2025-03-03 09:31:57,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:31:57,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:57,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 09:31:57,773 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 6 equivalence classes. [2025-03-03 09:31:57,800 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 09:31:57,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:31:57,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:57,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:31:57,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:31:57,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:31:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103689846] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:57,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2025-03-03 09:31:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281603050] [2025-03-03 09:31:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:57,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 09:31:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:57,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 09:31:57,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2025-03-03 09:31:57,971 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 09:31:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:31:58,036 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2025-03-03 09:31:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:31:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2025-03-03 09:31:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:31:58,037 INFO L225 Difference]: With dead ends: 82 [2025-03-03 09:31:58,037 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 09:31:58,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:31:58,037 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:31:58,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:31:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 09:31:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2025-03-03 09:31:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 09:31:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2025-03-03 09:31:58,043 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 58 [2025-03-03 09:31:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:31:58,043 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2025-03-03 09:31:58,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 09:31:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2025-03-03 09:31:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 09:31:58,044 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:31:58,044 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:31:58,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 09:31:58,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 09:31:58,244 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:31:58,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:31:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1121565363, now seen corresponding path program 10 times [2025-03-03 09:31:58,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:31:58,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769205766] [2025-03-03 09:31:58,245 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:31:58,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:31:58,251 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-03 09:31:58,260 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 09:31:58,260 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:31:58,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 09:31:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:31:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769205766] [2025-03-03 09:31:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769205766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:31:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923784749] [2025-03-03 09:31:58,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:31:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:31:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:31:58,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:31:58,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 09:31:58,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-03 09:31:58,617 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 09:31:58,617 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:31:58,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:31:58,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 09:31:58,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:31:58,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:31:58,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:31:58,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:31:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:31:59,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:31:59,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:31:59,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:31:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 09:31:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923784749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:31:59,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:31:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 35 [2025-03-03 09:31:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582780512] [2025-03-03 09:31:59,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:31:59,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 09:31:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:31:59,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 09:31:59,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 09:31:59,193 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-03 09:32:03,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:07,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:11,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:15,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:15,623 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2025-03-03 09:32:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 09:32:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 62 [2025-03-03 09:32:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:15,625 INFO L225 Difference]: With dead ends: 98 [2025-03-03 09:32:15,625 INFO L226 Difference]: Without dead ends: 96 [2025-03-03 09:32:15,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 09:32:15,626 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:15,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 412 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 725 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2025-03-03 09:32:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-03 09:32:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2025-03-03 09:32:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2025-03-03 09:32:15,633 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 62 [2025-03-03 09:32:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:15,633 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2025-03-03 09:32:15,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-03 09:32:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2025-03-03 09:32:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 09:32:15,634 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:15,634 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:15,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 09:32:15,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:15,836 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:15,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2002260738, now seen corresponding path program 11 times [2025-03-03 09:32:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:15,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735554476] [2025-03-03 09:32:15,836 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:15,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:15,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 7 equivalence classes. [2025-03-03 09:32:15,857 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 09:32:15,857 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 09:32:15,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-03 09:32:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735554476] [2025-03-03 09:32:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735554476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735905508] [2025-03-03 09:32:16,170 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:16,172 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:16,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 09:32:16,217 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 7 equivalence classes. [2025-03-03 09:32:16,239 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 09:32:16,239 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 09:32:16,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:16,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 09:32:16,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:16,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:16,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 09:32:16,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:16,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:16,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 09:32:16,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735905508] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:16,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:16,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 39 [2025-03-03 09:32:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704946718] [2025-03-03 09:32:16,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:16,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-03 09:32:16,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:16,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-03 09:32:16,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:32:16,881 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-03 09:32:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:17,358 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2025-03-03 09:32:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 09:32:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 65 [2025-03-03 09:32:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:17,359 INFO L225 Difference]: With dead ends: 111 [2025-03-03 09:32:17,359 INFO L226 Difference]: Without dead ends: 109 [2025-03-03 09:32:17,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 09:32:17,360 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:17,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 443 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:32:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-03 09:32:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2025-03-03 09:32:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2025-03-03 09:32:17,374 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 65 [2025-03-03 09:32:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:17,374 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2025-03-03 09:32:17,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-03 09:32:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2025-03-03 09:32:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-03 09:32:17,375 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:17,375 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:17,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 09:32:17,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-03 09:32:17,575 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:17,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -842966099, now seen corresponding path program 12 times [2025-03-03 09:32:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:17,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777187217] [2025-03-03 09:32:17,576 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:17,583 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 7 equivalence classes. [2025-03-03 09:32:17,592 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:32:17,592 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:32:17,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 09:32:17,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:17,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777187217] [2025-03-03 09:32:17,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777187217] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:17,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513277777] [2025-03-03 09:32:17,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:17,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:17,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 09:32:17,737 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 7 equivalence classes. [2025-03-03 09:32:17,794 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:32:17,794 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:32:17,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:17,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:32:17,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 09:32:17,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 09:32:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513277777] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:17,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:17,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-03 09:32:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313014169] [2025-03-03 09:32:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:17,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 09:32:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:17,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 09:32:17,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:32:17,986 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-03 09:32:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:18,065 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2025-03-03 09:32:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:32:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2025-03-03 09:32:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:18,066 INFO L225 Difference]: With dead ends: 110 [2025-03-03 09:32:18,066 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 09:32:18,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:32:18,066 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:18,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 101 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:32:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 09:32:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2025-03-03 09:32:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2025-03-03 09:32:18,073 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 68 [2025-03-03 09:32:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:18,074 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2025-03-03 09:32:18,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-03 09:32:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2025-03-03 09:32:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 09:32:18,074 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:18,074 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:18,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 09:32:18,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 09:32:18,275 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:18,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1363718684, now seen corresponding path program 13 times [2025-03-03 09:32:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408609820] [2025-03-03 09:32:18,275 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:18,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-03 09:32:18,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:32:18,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:18,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:32:18,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408609820] [2025-03-03 09:32:18,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408609820] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:18,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667893656] [2025-03-03 09:32:18,638 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:18,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:18,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 09:32:18,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-03 09:32:18,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:32:18,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:18,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:18,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-03 09:32:18,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:18,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:18,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:18,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:19,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 09:32:19,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667893656] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:19,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:32:19,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2025-03-03 09:32:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373561841] [2025-03-03 09:32:19,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:19,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 09:32:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:19,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 09:32:19,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 09:32:19,275 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-03-03 09:32:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:19,690 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2025-03-03 09:32:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 09:32:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 72 [2025-03-03 09:32:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:19,691 INFO L225 Difference]: With dead ends: 92 [2025-03-03 09:32:19,691 INFO L226 Difference]: Without dead ends: 90 [2025-03-03 09:32:19,691 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:32:19,692 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:19,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 321 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:32:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-03 09:32:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2025-03-03 09:32:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2025-03-03 09:32:19,701 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 72 [2025-03-03 09:32:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:19,701 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2025-03-03 09:32:19,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-03-03 09:32:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2025-03-03 09:32:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-03 09:32:19,702 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:19,702 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:19,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 09:32:19,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 09:32:19,902 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:19,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash 448534991, now seen corresponding path program 14 times [2025-03-03 09:32:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:19,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286084726] [2025-03-03 09:32:19,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:19,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:19,908 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-03 09:32:19,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-03 09:32:19,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:19,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 39 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:32:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286084726] [2025-03-03 09:32:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286084726] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512029992] [2025-03-03 09:32:20,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:20,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:20,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:20,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 09:32:20,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-03 09:32:20,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-03 09:32:20,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:20,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:20,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-03 09:32:20,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:20,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:32:20,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:32:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:32:20,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:20,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:20,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:32:21,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512029992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:21,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:21,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2025-03-03 09:32:21,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748091194] [2025-03-03 09:32:21,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:21,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 09:32:21,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:21,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 09:32:21,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:32:21,188 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-03 09:32:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:21,751 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2025-03-03 09:32:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 09:32:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 75 [2025-03-03 09:32:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:21,752 INFO L225 Difference]: With dead ends: 114 [2025-03-03 09:32:21,752 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 09:32:21,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=634, Invalid=3398, Unknown=0, NotChecked=0, Total=4032 [2025-03-03 09:32:21,753 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:21,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 378 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:32:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 09:32:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2025-03-03 09:32:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2025-03-03 09:32:21,761 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 75 [2025-03-03 09:32:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:21,761 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2025-03-03 09:32:21,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-03 09:32:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2025-03-03 09:32:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 09:32:21,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:21,762 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:21,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 09:32:21,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:21,962 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:21,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1718078221, now seen corresponding path program 15 times [2025-03-03 09:32:21,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:21,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-03 09:32:21,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:21,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:21,969 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 9 equivalence classes. [2025-03-03 09:32:21,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:32:21,994 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 09:32:21,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 109 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:22,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:22,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-03 09:32:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677496617] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:22,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649447236] [2025-03-03 09:32:22,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:22,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:22,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:22,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 09:32:22,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 9 equivalence classes. [2025-03-03 09:32:22,518 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:32:22,518 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 09:32:22,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:22,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-03 09:32:22,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:22,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:22,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:22,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:22,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:22,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:23,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 78 proven. 103 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 09:32:23,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:23,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-03 09:32:23,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-03 09:32:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 109 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-03 09:32:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649447236] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:23,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18] total 38 [2025-03-03 09:32:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23185437] [2025-03-03 09:32:23,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:23,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:32:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:23,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:32:23,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:32:23,251 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:27,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:31,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:32:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:31,634 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2025-03-03 09:32:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 09:32:31,634 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 76 [2025-03-03 09:32:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:31,635 INFO L225 Difference]: With dead ends: 84 [2025-03-03 09:32:31,635 INFO L226 Difference]: Without dead ends: 82 [2025-03-03 09:32:31,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 09:32:31,636 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:31,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 391 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 770 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2025-03-03 09:32:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-03 09:32:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2025-03-03 09:32:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 09:32:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2025-03-03 09:32:31,646 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 76 [2025-03-03 09:32:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:31,646 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2025-03-03 09:32:31,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2025-03-03 09:32:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-03 09:32:31,647 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:31,647 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:31,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 09:32:31,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:31,847 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:31,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 196579693, now seen corresponding path program 16 times [2025-03-03 09:32:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:31,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536229279] [2025-03-03 09:32:31,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:32:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:31,854 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-03 09:32:31,867 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 09:32:31,868 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:32:31,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:32,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:32,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536229279] [2025-03-03 09:32:32,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536229279] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:32,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445899137] [2025-03-03 09:32:32,222 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:32:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:32,224 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:32,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 09:32:32,273 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-03 09:32:32,299 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 09:32:32,300 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:32:32,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:32,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 09:32:32,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:32,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:32,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:32:32,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:32:32,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:33,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:32:33,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:32:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445899137] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:33,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:33,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 43 [2025-03-03 09:32:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250176371] [2025-03-03 09:32:33,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:33,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 09:32:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:33,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 09:32:33,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 09:32:33,117 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:33,726 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2025-03-03 09:32:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 09:32:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 82 [2025-03-03 09:32:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:33,727 INFO L225 Difference]: With dead ends: 132 [2025-03-03 09:32:33,727 INFO L226 Difference]: Without dead ends: 130 [2025-03-03 09:32:33,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=2739, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:32:33,728 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:33,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 567 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:32:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-03 09:32:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2025-03-03 09:32:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2025-03-03 09:32:33,738 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 82 [2025-03-03 09:32:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:33,739 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2025-03-03 09:32:33,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2025-03-03 09:32:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-03 09:32:33,739 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:33,739 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:33,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 09:32:33,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-03 09:32:33,940 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:33,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2028884770, now seen corresponding path program 17 times [2025-03-03 09:32:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:33,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122822815] [2025-03-03 09:32:33,940 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:33,947 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 85 statements into 9 equivalence classes. [2025-03-03 09:32:33,958 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-03-03 09:32:33,959 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 09:32:33,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122822815] [2025-03-03 09:32:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122822815] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520928212] [2025-03-03 09:32:34,323 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:34,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:34,325 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:34,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 09:32:34,377 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 85 statements into 9 equivalence classes. [2025-03-03 09:32:34,405 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-03-03 09:32:34,405 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 09:32:34,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:34,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 09:32:34,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:34,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:34,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:34,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:35,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:35,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 09:32:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520928212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:35,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:35,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 44 [2025-03-03 09:32:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472292089] [2025-03-03 09:32:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:35,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 09:32:35,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:35,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 09:32:35,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 09:32:35,208 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:35,808 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2025-03-03 09:32:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:32:35,809 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 85 [2025-03-03 09:32:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:35,809 INFO L225 Difference]: With dead ends: 146 [2025-03-03 09:32:35,809 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 09:32:35,810 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 140 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2025-03-03 09:32:35,812 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 131 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:35,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 509 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:32:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 09:32:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 96. [2025-03-03 09:32:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2025-03-03 09:32:35,823 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2025-03-03 09:32:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:35,823 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2025-03-03 09:32:35,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-03 09:32:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2025-03-03 09:32:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-03 09:32:35,823 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:35,823 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:35,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 09:32:36,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 09:32:36,024 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:36,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 569446349, now seen corresponding path program 18 times [2025-03-03 09:32:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:36,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025031283] [2025-03-03 09:32:36,024 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:36,034 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 88 statements into 9 equivalence classes. [2025-03-03 09:32:36,050 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:32:36,050 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 09:32:36,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-03 09:32:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025031283] [2025-03-03 09:32:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025031283] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122929172] [2025-03-03 09:32:36,217 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:36,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:36,219 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:36,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 09:32:36,275 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 88 statements into 9 equivalence classes. [2025-03-03 09:32:36,366 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:32:36,367 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 09:32:36,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:36,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 09:32:36,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-03 09:32:36,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-03 09:32:36,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122929172] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:36,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:36,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2025-03-03 09:32:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958048392] [2025-03-03 09:32:36,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:36,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 09:32:36,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:36,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 09:32:36,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2025-03-03 09:32:36,695 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-03 09:32:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:36,819 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2025-03-03 09:32:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 09:32:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 88 [2025-03-03 09:32:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:36,820 INFO L225 Difference]: With dead ends: 150 [2025-03-03 09:32:36,820 INFO L226 Difference]: Without dead ends: 123 [2025-03-03 09:32:36,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 09:32:36,821 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:36,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:32:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-03 09:32:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2025-03-03 09:32:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2025-03-03 09:32:36,831 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 88 [2025-03-03 09:32:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:36,832 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2025-03-03 09:32:36,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-03 09:32:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2025-03-03 09:32:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 09:32:36,832 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:36,832 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:36,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 09:32:37,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:37,033 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:37,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash -292899076, now seen corresponding path program 19 times [2025-03-03 09:32:37,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882540542] [2025-03-03 09:32:37,033 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:37,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 09:32:37,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 09:32:37,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:37,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882540542] [2025-03-03 09:32:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882540542] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:37,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572909058] [2025-03-03 09:32:37,507 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:37,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:37,509 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:37,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 09:32:37,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 09:32:37,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 09:32:37,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:37,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:37,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-03 09:32:37,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:37,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:37,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:37,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:38,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 60 proven. 179 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-03 09:32:38,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:38,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:32:38,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:32:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572909058] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:38,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:38,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 23] total 48 [2025-03-03 09:32:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312542449] [2025-03-03 09:32:38,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:38,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-03 09:32:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:38,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-03 09:32:38,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 09:32:38,474 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2025-03-03 09:32:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:39,072 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2025-03-03 09:32:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 09:32:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) Word has length 92 [2025-03-03 09:32:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:39,073 INFO L225 Difference]: With dead ends: 118 [2025-03-03 09:32:39,073 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 09:32:39,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 152 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=3096, Unknown=0, NotChecked=0, Total=3422 [2025-03-03 09:32:39,075 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:39,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 533 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:32:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 09:32:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2025-03-03 09:32:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2025-03-03 09:32:39,089 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 92 [2025-03-03 09:32:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:39,089 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2025-03-03 09:32:39,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2025-03-03 09:32:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2025-03-03 09:32:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-03 09:32:39,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:39,090 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 09:32:39,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:39,291 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:39,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1618045167, now seen corresponding path program 20 times [2025-03-03 09:32:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089047982] [2025-03-03 09:32:39,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:39,297 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-03 09:32:39,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-03 09:32:39,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:39,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 72 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:39,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089047982] [2025-03-03 09:32:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089047982] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150275916] [2025-03-03 09:32:39,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:39,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:39,773 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:39,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 09:32:39,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-03 09:32:39,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-03 09:32:39,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:39,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:39,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 09:32:39,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:40,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:32:40,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:32:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:40,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:40,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:40,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150275916] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:41,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:41,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2025-03-03 09:32:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998402529] [2025-03-03 09:32:41,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:41,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-03-03 09:32:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:41,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-03-03 09:32:41,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=3382, Unknown=0, NotChecked=0, Total=3906 [2025-03-03 09:32:41,051 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2025-03-03 09:32:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:41,806 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2025-03-03 09:32:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 09:32:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 95 [2025-03-03 09:32:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:41,807 INFO L225 Difference]: With dead ends: 140 [2025-03-03 09:32:41,808 INFO L226 Difference]: Without dead ends: 105 [2025-03-03 09:32:41,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=902, Invalid=5260, Unknown=0, NotChecked=0, Total=6162 [2025-03-03 09:32:41,809 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:41,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 475 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:32:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-03 09:32:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2025-03-03 09:32:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2025-03-03 09:32:41,821 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 95 [2025-03-03 09:32:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:41,821 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2025-03-03 09:32:41,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2025-03-03 09:32:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2025-03-03 09:32:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-03 09:32:41,822 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:41,822 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:41,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-03 09:32:42,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-03 09:32:42,022 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:42,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1958524717, now seen corresponding path program 21 times [2025-03-03 09:32:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753661785] [2025-03-03 09:32:42,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:42,029 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 11 equivalence classes. [2025-03-03 09:32:42,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 96 of 96 statements. [2025-03-03 09:32:42,052 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 09:32:42,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 24 proven. 187 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:42,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:42,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753661785] [2025-03-03 09:32:42,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753661785] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074356867] [2025-03-03 09:32:42,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:42,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:42,499 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:42,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 09:32:42,559 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 11 equivalence classes. [2025-03-03 09:32:42,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 96 of 96 statements. [2025-03-03 09:32:42,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 09:32:42,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:42,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-03 09:32:42,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:42,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-03 09:32:42,887 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:32:42,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:32:42,933 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:32:42,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:32:43,019 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:32:43,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-03 09:32:43,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:32:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 108 proven. 181 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-03-03 09:32:43,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:43,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-03 09:32:43,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-03 09:32:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 187 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2025-03-03 09:32:43,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074356867] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:43,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:43,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 22] total 41 [2025-03-03 09:32:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454435917] [2025-03-03 09:32:43,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:43,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 09:32:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:43,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 09:32:43,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 09:32:43,408 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2025-03-03 09:32:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:43,985 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2025-03-03 09:32:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:32:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) Word has length 96 [2025-03-03 09:32:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:43,986 INFO L225 Difference]: With dead ends: 104 [2025-03-03 09:32:43,986 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 09:32:43,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 09:32:43,987 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:43,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 610 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:32:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 09:32:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2025-03-03 09:32:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 09:32:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2025-03-03 09:32:43,997 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 96 [2025-03-03 09:32:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:43,997 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2025-03-03 09:32:43,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2025-03-03 09:32:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2025-03-03 09:32:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 09:32:43,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:43,998 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:44,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 09:32:44,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 09:32:44,199 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:44,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -428677747, now seen corresponding path program 22 times [2025-03-03 09:32:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137533605] [2025-03-03 09:32:44,199 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:32:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:44,206 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 09:32:44,219 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 09:32:44,220 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:32:44,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:44,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137533605] [2025-03-03 09:32:44,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137533605] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325256014] [2025-03-03 09:32:44,643 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:32:44,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:44,645 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:44,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 09:32:44,706 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 09:32:44,734 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 09:32:44,735 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:32:44,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:44,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-03 09:32:44,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:45,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:45,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:32:45,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 61 proven. 221 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:32:45,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:45,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:32:45,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:32:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:45,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325256014] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:45,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 53 [2025-03-03 09:32:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259311735] [2025-03-03 09:32:45,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:45,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-03 09:32:45,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:45,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-03 09:32:45,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 09:32:45,773 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-03-03 09:32:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:46,511 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2025-03-03 09:32:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 09:32:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 102 [2025-03-03 09:32:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:46,513 INFO L225 Difference]: With dead ends: 158 [2025-03-03 09:32:46,513 INFO L226 Difference]: Without dead ends: 156 [2025-03-03 09:32:46,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2025-03-03 09:32:46,513 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 181 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:46,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 663 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:32:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-03 09:32:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2025-03-03 09:32:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 09:32:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2025-03-03 09:32:46,527 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 102 [2025-03-03 09:32:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:46,527 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2025-03-03 09:32:46,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-03-03 09:32:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2025-03-03 09:32:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-03 09:32:46,528 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:46,528 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:46,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 09:32:46,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 09:32:46,728 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:46,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1800117058, now seen corresponding path program 23 times [2025-03-03 09:32:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364734245] [2025-03-03 09:32:46,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:46,735 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 11 equivalence classes. [2025-03-03 09:32:46,751 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 09:32:46,752 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:32:46,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:47,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:47,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364734245] [2025-03-03 09:32:47,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364734245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:47,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182580395] [2025-03-03 09:32:47,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:32:47,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:47,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:47,246 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:47,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 09:32:47,315 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 11 equivalence classes. [2025-03-03 09:32:47,367 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 09:32:47,367 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:32:47,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:47,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-03 09:32:47,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:47,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:48,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 247 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-03 09:32:48,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:48,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:48,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:48,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182580395] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:48,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 50 [2025-03-03 09:32:48,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665846966] [2025-03-03 09:32:48,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:48,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 09:32:48,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:48,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 09:32:48,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2259, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:32:48,374 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2025-03-03 09:32:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:49,174 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2025-03-03 09:32:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 09:32:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 105 [2025-03-03 09:32:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:49,176 INFO L225 Difference]: With dead ends: 178 [2025-03-03 09:32:49,176 INFO L226 Difference]: Without dead ends: 176 [2025-03-03 09:32:49,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 177 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2025-03-03 09:32:49,176 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:49,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 770 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 09:32:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-03 09:32:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 116. [2025-03-03 09:32:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 09:32:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2025-03-03 09:32:49,191 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 105 [2025-03-03 09:32:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:49,191 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2025-03-03 09:32:49,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2025-03-03 09:32:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2025-03-03 09:32:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 09:32:49,192 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:49,192 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:49,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 09:32:49,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 09:32:49,392 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:49,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash -324744211, now seen corresponding path program 24 times [2025-03-03 09:32:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456577577] [2025-03-03 09:32:49,393 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:49,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:49,403 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 108 statements into 11 equivalence classes. [2025-03-03 09:32:49,419 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 09:32:49,419 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 09:32:49,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:32:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456577577] [2025-03-03 09:32:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456577577] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982319569] [2025-03-03 09:32:49,650 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:32:49,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:49,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:49,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 09:32:49,725 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 108 statements into 11 equivalence classes. [2025-03-03 09:32:49,859 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 09:32:49,859 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 09:32:49,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:49,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 09:32:49,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:32:50,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:32:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982319569] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 33 [2025-03-03 09:32:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114052772] [2025-03-03 09:32:50,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:50,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 09:32:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:50,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 09:32:50,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 09:32:50,207 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-03 09:32:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:50,362 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2025-03-03 09:32:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 09:32:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 108 [2025-03-03 09:32:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:50,363 INFO L225 Difference]: With dead ends: 182 [2025-03-03 09:32:50,363 INFO L226 Difference]: Without dead ends: 149 [2025-03-03 09:32:50,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 09:32:50,364 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:50,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 182 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:32:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2025-03-03 09:32:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2025-03-03 09:32:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 09:32:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2025-03-03 09:32:50,378 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 108 [2025-03-03 09:32:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:50,379 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2025-03-03 09:32:50,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-03 09:32:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2025-03-03 09:32:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-03-03 09:32:50,380 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:50,380 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:50,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-03 09:32:50,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 09:32:50,581 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:50,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash -114215972, now seen corresponding path program 25 times [2025-03-03 09:32:50,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:50,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033215113] [2025-03-03 09:32:50,581 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:50,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-03 09:32:50,600 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-03 09:32:50,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:50,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 09:32:51,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033215113] [2025-03-03 09:32:51,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033215113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:51,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909490038] [2025-03-03 09:32:51,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:32:51,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:51,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:51,066 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:51,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 09:32:51,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-03 09:32:51,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-03 09:32:51,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:32:51,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:51,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 09:32:51,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:51,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:51,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:32:51,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-03 09:32:51,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 68 proven. 275 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-03 09:32:51,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:52,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-03 09:32:52,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-03 09:32:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 09:32:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909490038] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:52,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:52,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 28] total 56 [2025-03-03 09:32:52,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920191638] [2025-03-03 09:32:52,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:52,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-03 09:32:52,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:52,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-03 09:32:52,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:32:52,328 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-03-03 09:32:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:53,153 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2025-03-03 09:32:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 09:32:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 112 [2025-03-03 09:32:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:53,154 INFO L225 Difference]: With dead ends: 144 [2025-03-03 09:32:53,154 INFO L226 Difference]: Without dead ends: 142 [2025-03-03 09:32:53,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=4420, Unknown=0, NotChecked=0, Total=4830 [2025-03-03 09:32:53,155 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 114 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:53,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 680 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 09:32:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-03 09:32:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2025-03-03 09:32:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 09:32:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2025-03-03 09:32:53,175 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 112 [2025-03-03 09:32:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:53,175 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2025-03-03 09:32:53,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-03-03 09:32:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2025-03-03 09:32:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2025-03-03 09:32:53,176 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:53,176 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:53,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-03 09:32:53,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:53,376 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:53,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -993050609, now seen corresponding path program 26 times [2025-03-03 09:32:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372476661] [2025-03-03 09:32:53,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:53,384 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 115 statements into 2 equivalence classes. [2025-03-03 09:32:53,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-03 09:32:53,392 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:53,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 117 proven. 214 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 09:32:53,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372476661] [2025-03-03 09:32:53,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372476661] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309696506] [2025-03-03 09:32:53,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:32:53,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:53,968 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-03 09:32:54,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 115 statements into 2 equivalence classes. [2025-03-03 09:32:54,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-03 09:32:54,075 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:32:54,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:54,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-03-03 09:32:54,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:54,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:54,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:32:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 27 proven. 325 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2025-03-03 09:32:54,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:32:55,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:32:55,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-03 09:32:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 33 proven. 298 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 09:32:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309696506] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:32:55,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:32:55,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 28] total 78 [2025-03-03 09:32:55,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247066310] [2025-03-03 09:32:55,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:32:55,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-03-03 09:32:55,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:32:55,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-03-03 09:32:55,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=5655, Unknown=0, NotChecked=0, Total=6006 [2025-03-03 09:32:55,841 INFO L87 Difference]: Start difference. First operand 139 states and 145 transitions. Second operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 71 states have internal predecessors, (165), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2025-03-03 09:32:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:32:57,818 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2025-03-03 09:32:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 09:32:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 71 states have internal predecessors, (165), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) Word has length 115 [2025-03-03 09:32:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:32:57,819 INFO L225 Difference]: With dead ends: 164 [2025-03-03 09:32:57,819 INFO L226 Difference]: Without dead ends: 125 [2025-03-03 09:32:57,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=944, Invalid=10828, Unknown=0, NotChecked=0, Total=11772 [2025-03-03 09:32:57,821 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 328 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:32:57,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1008 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 09:32:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-03 09:32:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2025-03-03 09:32:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 09:32:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2025-03-03 09:32:57,836 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 115 [2025-03-03 09:32:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:32:57,836 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2025-03-03 09:32:57,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 71 states have internal predecessors, (165), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2025-03-03 09:32:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2025-03-03 09:32:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-03 09:32:57,837 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:32:57,837 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:32:57,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-03 09:32:58,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-03 09:32:58,038 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:32:58,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:32:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash 690727757, now seen corresponding path program 27 times [2025-03-03 09:32:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:32:58,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365447674] [2025-03-03 09:32:58,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:58,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:32:58,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 13 equivalence classes. [2025-03-03 09:32:58,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 09:32:58,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 09:32:58,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 30 proven. 289 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-03-03 09:32:58,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:32:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365447674] [2025-03-03 09:32:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365447674] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:32:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8682869] [2025-03-03 09:32:58,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:32:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:32:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:32:58,691 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:32:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-03 09:32:58,767 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 13 equivalence classes. [2025-03-03 09:32:59,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 09:32:59,061 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 09:32:59,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:32:59,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-03 09:32:59,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:32:59,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:32:59,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:32:59,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:32:59,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-03 09:33:00,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:33:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 114 proven. 322 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2025-03-03 09:33:00,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:33:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8682869] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:33:00,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:33:00,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 53 [2025-03-03 09:33:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754196566] [2025-03-03 09:33:00,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:33:00,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-03 09:33:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:33:00,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-03 09:33:00,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:33:00,293 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 48 states have internal predecessors, (108), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26)