./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_02.i -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 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:27:38,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:27:38,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:27:38,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:27:38,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:27:38,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:27:38,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:27:38,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:27:38,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:27:38,954 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:27:38,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:27:38,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:27:38,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:27:38,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:27:38,955 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:27:38,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:27:38,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:27:38,956 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:27:38,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:27:38,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:27:38,957 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:27:38,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:27:38,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:27:38,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:27:38,957 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 -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2025-03-16 13:27:39,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:27:39,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:27:39,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:27:39,189 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:27:39,189 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:27:39,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_02.i [2025-03-16 13:27:40,353 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a61168c/9b3ef58005724d29b14f9c957ddab2d3/FLAG1e0b0270f [2025-03-16 13:27:40,579 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:27:40,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_02.i [2025-03-16 13:27:40,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a61168c/9b3ef58005724d29b14f9c957ddab2d3/FLAG1e0b0270f [2025-03-16 13:27:40,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a61168c/9b3ef58005724d29b14f9c957ddab2d3 [2025-03-16 13:27:40,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:27:40,925 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:27:40,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:27:40,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:27:40,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:27:40,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:27:40" (1/1) ... [2025-03-16 13:27:40,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26eea268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:40, skipping insertion in model container [2025-03-16 13:27:40,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:27:40" (1/1) ... [2025-03-16 13:27:40,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:27:41,041 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-examples/standard_two_index_02.i[814,827] [2025-03-16 13:27:41,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:27:41,060 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:27:41,067 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-examples/standard_two_index_02.i[814,827] [2025-03-16 13:27:41,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:27:41,084 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:27:41,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41 WrapperNode [2025-03-16 13:27:41,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:27:41,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:27:41,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:27:41,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:27:41,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,107 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2025-03-16 13:27:41,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:27:41,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:27:41,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:27:41,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:27:41,113 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,119 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,128 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-03-16 13:27:41,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,134 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,140 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:27:41,141 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:27:41,141 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:27:41,141 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:27:41,142 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (1/1) ... [2025-03-16 13:27:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:27:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:41,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:27:41,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:27:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:27:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:27:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:27:41,243 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:27:41,244 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:27:41,346 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset; [2025-03-16 13:27:41,350 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-16 13:27:41,351 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:27:41,356 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:27:41,357 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:27:41,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:27:41 BoogieIcfgContainer [2025-03-16 13:27:41,357 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:27:41,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:27:41,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:27:41,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:27:41,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:27:40" (1/3) ... [2025-03-16 13:27:41,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e773aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:27:41, skipping insertion in model container [2025-03-16 13:27:41,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:27:41" (2/3) ... [2025-03-16 13:27:41,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e773aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:27:41, skipping insertion in model container [2025-03-16 13:27:41,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:27:41" (3/3) ... [2025-03-16 13:27:41,365 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2025-03-16 13:27:41,376 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:27:41,377 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_two_index_02.i that has 1 procedures, 11 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:27:41,415 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:27:41,423 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;@55d6b2a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:27:41,423 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:27:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 13:27:41,430 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:41,430 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 13:27:41,430 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:41,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1299700829, now seen corresponding path program 1 times [2025-03-16 13:27:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066275147] [2025-03-16 13:27:41,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:27:41,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:41,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 13:27:41,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 13:27:41,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:27:41,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:27:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066275147] [2025-03-16 13:27:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066275147] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:27:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:27:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:27:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461869541] [2025-03-16 13:27:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:27:41,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:27:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:41,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:27:41,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:27:41,625 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:41,656 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2025-03-16 13:27:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:27:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-16 13:27:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:41,665 INFO L225 Difference]: With dead ends: 21 [2025-03-16 13:27:41,665 INFO L226 Difference]: Without dead ends: 9 [2025-03-16 13:27:41,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:27:41,669 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:41,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:27:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-03-16 13:27:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-03-16 13:27:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2025-03-16 13:27:41,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2025-03-16 13:27:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:41,690 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2025-03-16 13:27:41,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2025-03-16 13:27:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 13:27:41,691 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:41,691 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:41,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:27:41,691 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:41,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1666527978, now seen corresponding path program 1 times [2025-03-16 13:27:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866719423] [2025-03-16 13:27:41,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:27:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:41,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:27:41,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:27:41,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:27:41,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:27:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866719423] [2025-03-16 13:27:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866719423] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316789638] [2025-03-16 13:27:41,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:27:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:41,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:41,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:27:41,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:27:41,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:27:41,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:27:41,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:41,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 13:27:41,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:27:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:27:41,850 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:27:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316789638] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:27:41,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:27:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2025-03-16 13:27:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312691478] [2025-03-16 13:27:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:27:41,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:27:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:41,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:27:41,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:27:41,852 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:41,874 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2025-03-16 13:27:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:27:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 13:27:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:41,876 INFO L225 Difference]: With dead ends: 20 [2025-03-16 13:27:41,876 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 13:27:41,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:27:41,876 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:41,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:27:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 13:27:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2025-03-16 13:27:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-03-16 13:27:41,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2025-03-16 13:27:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:41,879 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-03-16 13:27:41,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-03-16 13:27:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:27:41,879 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:41,879 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:41,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:27:42,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:42,083 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:42,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 123715037, now seen corresponding path program 1 times [2025-03-16 13:27:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681770087] [2025-03-16 13:27:42,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:27:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:42,093 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:27:42,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:27:42,099 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:27:42,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:27:42,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681770087] [2025-03-16 13:27:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681770087] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277826826] [2025-03-16 13:27:42,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:27:42,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:42,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:42,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:27:42,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:27:42,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:27:42,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:27:42,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:42,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:27:42,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:27:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:27:42,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:27:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:27:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277826826] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:27:42,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:27:42,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 13:27:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980696987] [2025-03-16 13:27:42,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:27:42,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 13:27:42,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:42,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 13:27:42,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:27:42,242 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:42,295 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2025-03-16 13:27:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:27:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:27:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:42,296 INFO L225 Difference]: With dead ends: 31 [2025-03-16 13:27:42,296 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 13:27:42,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:27:42,296 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:42,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:27:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 13:27:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2025-03-16 13:27:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-03-16 13:27:42,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2025-03-16 13:27:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:42,301 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-03-16 13:27:42,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-03-16 13:27:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 13:27:42,301 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:42,301 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:42,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:27:42,506 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 [2025-03-16 13:27:42,506 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:42,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1381329603, now seen corresponding path program 2 times [2025-03-16 13:27:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481716196] [2025-03-16 13:27:42,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:27:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:42,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-16 13:27:42,550 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 13:27:42,550 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:27:42,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:27:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481716196] [2025-03-16 13:27:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481716196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753581755] [2025-03-16 13:27:42,636 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:27:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:42,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:42,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:27:42,686 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-16 13:27:42,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 13:27:42,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:27:42,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:42,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:27:42,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:27:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:27:42,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:27:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:27:42,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753581755] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:27:42,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:27:42,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2025-03-16 13:27:42,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181147473] [2025-03-16 13:27:42,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:27:42,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:27:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:42,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:27:42,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:27:42,784 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:42,860 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2025-03-16 13:27:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:27:42,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 13:27:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:42,862 INFO L225 Difference]: With dead ends: 59 [2025-03-16 13:27:42,862 INFO L226 Difference]: Without dead ends: 51 [2025-03-16 13:27:42,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:27:42,864 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:42,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 30 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:27:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-16 13:27:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2025-03-16 13:27:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2025-03-16 13:27:42,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2025-03-16 13:27:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:42,871 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2025-03-16 13:27:42,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2025-03-16 13:27:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:27:42,871 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:42,871 INFO L218 NwaCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:42,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:27:43,071 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 [2025-03-16 13:27:43,072 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:43,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1920113130, now seen corresponding path program 3 times [2025-03-16 13:27:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:43,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111934523] [2025-03-16 13:27:43,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:27:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:43,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-03-16 13:27:43,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 18 of 23 statements. [2025-03-16 13:27:43,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:27:43,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 13:27:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111934523] [2025-03-16 13:27:43,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111934523] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888332656] [2025-03-16 13:27:43,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:27:43,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:43,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:43,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:43,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:27:43,355 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 7 equivalence classes. [2025-03-16 13:27:43,390 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 18 of 23 statements. [2025-03-16 13:27:43,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:27:43,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:43,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:27:43,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:27:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 13:27:43,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:27:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 13:27:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888332656] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:27:43,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:27:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-16 13:27:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095365515] [2025-03-16 13:27:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:27:43,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:27:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:43,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:27:43,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:27:43,520 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:43,625 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2025-03-16 13:27:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:27:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:27:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:43,626 INFO L225 Difference]: With dead ends: 114 [2025-03-16 13:27:43,627 INFO L226 Difference]: Without dead ends: 102 [2025-03-16 13:27:43,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:27:43,627 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 128 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:43,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 45 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:27:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-16 13:27:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 36. [2025-03-16 13:27:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2025-03-16 13:27:43,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 23 [2025-03-16 13:27:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:43,633 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2025-03-16 13:27:43,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2025-03-16 13:27:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:27:43,633 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:43,633 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:43,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:27:43,834 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 [2025-03-16 13:27:43,834 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:43,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1965604637, now seen corresponding path program 4 times [2025-03-16 13:27:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055056363] [2025-03-16 13:27:43,835 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:27:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:43,857 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:27:43,877 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:27:43,878 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:27:43,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:27:44,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:44,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055056363] [2025-03-16 13:27:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055056363] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:44,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870471300] [2025-03-16 13:27:44,153 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:27:44,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:44,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:44,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:44,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:27:44,208 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:27:44,239 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:27:44,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:27:44,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:44,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:27:44,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:27:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:27:44,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:27:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:27:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870471300] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:27:44,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:27:44,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2025-03-16 13:27:44,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324948410] [2025-03-16 13:27:44,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:27:44,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 13:27:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:27:44,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 13:27:44,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:27:44,597 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:27:44,792 INFO L93 Difference]: Finished difference Result 200 states and 236 transitions. [2025-03-16 13:27:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-16 13:27:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-16 13:27:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:27:44,794 INFO L225 Difference]: With dead ends: 200 [2025-03-16 13:27:44,794 INFO L226 Difference]: Without dead ends: 180 [2025-03-16 13:27:44,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:27:44,795 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 312 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:27:44,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 99 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:27:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-03-16 13:27:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 69. [2025-03-16 13:27:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2025-03-16 13:27:44,801 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 34 [2025-03-16 13:27:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:27:44,801 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2025-03-16 13:27:44,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:27:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2025-03-16 13:27:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 13:27:44,802 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:27:44,802 INFO L218 NwaCegarLoop]: trace histogram [38, 23, 1, 1, 1, 1, 1, 1] [2025-03-16 13:27:44,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:27:45,002 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 [2025-03-16 13:27:45,003 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:27:45,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:27:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1585467894, now seen corresponding path program 5 times [2025-03-16 13:27:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:27:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569465553] [2025-03-16 13:27:45,003 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:27:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:27:45,026 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 20 equivalence classes. [2025-03-16 13:27:45,193 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:27:45,194 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-03-16 13:27:45,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:27:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-16 13:27:46,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:27:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569465553] [2025-03-16 13:27:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569465553] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:27:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072119651] [2025-03-16 13:27:46,392 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:27:46,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:27:46,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:27:46,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:27:46,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:27:46,477 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 20 equivalence classes.