./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_running-1.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_running-1.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 7b8d5eeb19c9858fcb0b2998e8b2a6094462b42b704d3f987f7fa52a623cb169 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:26:04,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:26:04,117 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:26:04,122 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:26:04,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:26:04,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:26:04,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:26:04,144 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:26:04,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:26:04,145 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:26:04,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:26:04,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:26:04,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:26:04,146 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:26:04,146 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:26:04,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:26:04,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:26:04,146 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:26:04,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:26:04,147 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:26:04,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:26:04,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:26:04,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:26:04,148 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 -> 7b8d5eeb19c9858fcb0b2998e8b2a6094462b42b704d3f987f7fa52a623cb169 [2025-03-16 13:26:04,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:26:04,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:26:04,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:26:04,372 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:26:04,373 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:26:04,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-1.i [2025-03-16 13:26:05,471 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffc25b49/a74be0911b2e4321831e53a0b407da0e/FLAG969f9f43c [2025-03-16 13:26:05,699 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:26:05,700 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i [2025-03-16 13:26:05,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffc25b49/a74be0911b2e4321831e53a0b407da0e/FLAG969f9f43c [2025-03-16 13:26:05,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffc25b49/a74be0911b2e4321831e53a0b407da0e [2025-03-16 13:26:05,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:26:05,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:26:05,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:26:05,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:26:05,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:26:05,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67594968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05, skipping insertion in model container [2025-03-16 13:26:05,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,744 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:26:05,843 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_running-1.i[811,824] [2025-03-16 13:26:05,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:26:05,865 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:26:05,872 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_running-1.i[811,824] [2025-03-16 13:26:05,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:26:05,891 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:26:05,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05 WrapperNode [2025-03-16 13:26:05,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:26:05,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:26:05,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:26:05,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:26:05,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,916 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2025-03-16 13:26:05,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:26:05,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:26:05,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:26:05,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:26:05,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,928 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,936 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2025-03-16 13:26:05,936 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,943 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:26:05,950 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:26:05,950 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:26:05,950 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:26:05,951 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (1/1) ... [2025-03-16 13:26:05,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:26:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:05,977 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 13:26:05,980 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 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:26:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:26:06,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:26:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:26:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:26:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:26:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:26:06,054 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:26:06,055 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:26:06,194 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 13:26:06,199 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-16 13:26:06,199 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:26:06,205 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:26:06,205 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:26:06,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:26:06 BoogieIcfgContainer [2025-03-16 13:26:06,205 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:26:06,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:26:06,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:26:06,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:26:06,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:26:05" (1/3) ... [2025-03-16 13:26:06,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279836bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:26:06, skipping insertion in model container [2025-03-16 13:26:06,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:26:05" (2/3) ... [2025-03-16 13:26:06,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279836bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:26:06, skipping insertion in model container [2025-03-16 13:26:06,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:26:06" (3/3) ... [2025-03-16 13:26:06,212 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2025-03-16 13:26:06,221 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:26:06,222 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_running-1.i that has 1 procedures, 19 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:26:06,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:26:06,264 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;@7d5a7f1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:26:06,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:26:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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 13:26:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 13:26:06,269 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:06,270 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 13:26:06,270 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:06,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1684182482, now seen corresponding path program 1 times [2025-03-16 13:26:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:06,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190419434] [2025-03-16 13:26:06,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:06,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:06,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 13:26:06,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 13:26:06,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:06,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:06,404 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 13:26:06,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190419434] [2025-03-16 13:26:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190419434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:26:06,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:26:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:26:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876403494] [2025-03-16 13:26:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:26:06,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:26:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:06,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:26:06,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:26:06,424 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) 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 13:26:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:06,479 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2025-03-16 13:26:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:26:06,481 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 13:26:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:06,485 INFO L225 Difference]: With dead ends: 47 [2025-03-16 13:26:06,485 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:26:06,488 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 13:26:06,491 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:06,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:26:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:26:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2025-03-16 13:26:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 13:26:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2025-03-16 13:26:06,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 6 [2025-03-16 13:26:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:06,514 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2025-03-16 13:26:06,514 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 13:26:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2025-03-16 13:26:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:26:06,516 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:06,516 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:06,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:26:06,516 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:06,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1458326414, now seen corresponding path program 1 times [2025-03-16 13:26:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244955289] [2025-03-16 13:26:06,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:06,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:26:06,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:26:06,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:06,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:26:06,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244955289] [2025-03-16 13:26:06,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244955289] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283056091] [2025-03-16 13:26:06,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:06,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:06,609 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 13:26:06,610 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 13:26:06,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:26:06,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:26:06,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:06,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:06,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:26:06,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:26:06,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:26:06,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283056091] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:06,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:06,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 13:26:06,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648864170] [2025-03-16 13:26:06,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:06,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 13:26:06,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:06,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 13:26:06,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:26:06,728 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 13:26:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:06,815 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2025-03-16 13:26:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:26:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 17 [2025-03-16 13:26:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:06,816 INFO L225 Difference]: With dead ends: 66 [2025-03-16 13:26:06,816 INFO L226 Difference]: Without dead ends: 51 [2025-03-16 13:26:06,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 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 13:26:06,817 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:06,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:26:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-16 13:26:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-03-16 13:26:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 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 13:26:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2025-03-16 13:26:06,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 17 [2025-03-16 13:26:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:06,826 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2025-03-16 13:26:06,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 13:26:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2025-03-16 13:26:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:26:06,828 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:06,828 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:06,834 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 13:26:07,033 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 13:26:07,033 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:07,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -998515118, now seen corresponding path program 2 times [2025-03-16 13:26:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:07,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024611541] [2025-03-16 13:26:07,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:26:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:07,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-16 13:26:07,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:26:07,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:26:07,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-16 13:26:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:07,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024611541] [2025-03-16 13:26:07,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024611541] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:26:07,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:26:07,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:26:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087389215] [2025-03-16 13:26:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:26:07,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:26:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:07,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:26:07,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:26:07,321 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 13:26:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:07,373 INFO L93 Difference]: Finished difference Result 105 states and 155 transitions. [2025-03-16 13:26:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:26:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 50 [2025-03-16 13:26:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:07,376 INFO L225 Difference]: With dead ends: 105 [2025-03-16 13:26:07,376 INFO L226 Difference]: Without dead ends: 79 [2025-03-16 13:26:07,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:26:07,376 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:07,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:26:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-16 13:26:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2025-03-16 13:26:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 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 13:26:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 97 transitions. [2025-03-16 13:26:07,387 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 97 transitions. Word has length 50 [2025-03-16 13:26:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:07,387 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 97 transitions. [2025-03-16 13:26:07,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 13:26:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 97 transitions. [2025-03-16 13:26:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:26:07,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:07,389 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:07,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 13:26:07,389 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:07,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1681960942, now seen corresponding path program 1 times [2025-03-16 13:26:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820254139] [2025-03-16 13:26:07,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:07,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 13:26:07,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:26:07,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:07,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-16 13:26:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820254139] [2025-03-16 13:26:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820254139] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:26:07,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:26:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:26:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610597875] [2025-03-16 13:26:07,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:26:07,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:26:07,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:07,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:26:07,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:26:07,581 INFO L87 Difference]: Start difference. First operand 67 states and 97 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 13:26:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:07,634 INFO L93 Difference]: Finished difference Result 123 states and 176 transitions. [2025-03-16 13:26:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:26:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 50 [2025-03-16 13:26:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:07,636 INFO L225 Difference]: With dead ends: 123 [2025-03-16 13:26:07,636 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 13:26:07,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:26:07,637 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:07,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:26:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 13:26:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2025-03-16 13:26:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 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 13:26:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2025-03-16 13:26:07,641 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 50 [2025-03-16 13:26:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:07,641 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2025-03-16 13:26:07,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 13:26:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2025-03-16 13:26:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:26:07,642 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:07,642 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:07,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 13:26:07,642 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:07,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1393945006, now seen corresponding path program 1 times [2025-03-16 13:26:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760231718] [2025-03-16 13:26:07,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:07,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 13:26:07,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:26:07,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:07,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:26:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760231718] [2025-03-16 13:26:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760231718] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:26:07,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:26:07,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:26:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049360085] [2025-03-16 13:26:07,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:26:07,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:26:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:07,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:26:07,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:26:07,732 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 13:26:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:07,744 INFO L93 Difference]: Finished difference Result 108 states and 149 transitions. [2025-03-16 13:26:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:26:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 50 [2025-03-16 13:26:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:07,746 INFO L225 Difference]: With dead ends: 108 [2025-03-16 13:26:07,747 INFO L226 Difference]: Without dead ends: 105 [2025-03-16 13:26:07,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:26:07,748 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:07,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:26:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-16 13:26:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2025-03-16 13:26:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 99 states have internal predecessors, (141), 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 13:26:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 141 transitions. [2025-03-16 13:26:07,758 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 141 transitions. Word has length 50 [2025-03-16 13:26:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:07,759 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 141 transitions. [2025-03-16 13:26:07,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 13:26:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 141 transitions. [2025-03-16 13:26:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:26:07,761 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:07,761 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:07,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 13:26:07,761 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:07,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1158211955, now seen corresponding path program 1 times [2025-03-16 13:26:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:07,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826662580] [2025-03-16 13:26:07,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:07,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 13:26:07,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:26:07,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:07,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-03-16 13:26:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826662580] [2025-03-16 13:26:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826662580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690178447] [2025-03-16 13:26:07,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:07,869 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 13:26:07,870 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 13:26:07,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 13:26:07,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:26:07,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:07,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:07,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:26:07,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-03-16 13:26:07,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-03-16 13:26:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690178447] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:08,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:08,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-16 13:26:08,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374668425] [2025-03-16 13:26:08,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:08,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:26:08,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:08,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:26:08,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:26:08,027 INFO L87 Difference]: Start difference. First operand 100 states and 141 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 13:26:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:08,172 INFO L93 Difference]: Finished difference Result 355 states and 520 transitions. [2025-03-16 13:26:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:26:08,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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) Word has length 50 [2025-03-16 13:26:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:08,173 INFO L225 Difference]: With dead ends: 355 [2025-03-16 13:26:08,173 INFO L226 Difference]: Without dead ends: 261 [2025-03-16 13:26:08,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:26:08,174 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 338 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:08,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 68 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:26:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-03-16 13:26:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2025-03-16 13:26:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.423529411764706) internal successors, (363), 255 states have internal predecessors, (363), 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 13:26:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 363 transitions. [2025-03-16 13:26:08,193 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 363 transitions. Word has length 50 [2025-03-16 13:26:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:08,193 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 363 transitions. [2025-03-16 13:26:08,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 13:26:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 363 transitions. [2025-03-16 13:26:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-16 13:26:08,195 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:08,195 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:08,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:26:08,395 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,SelfDestructingSolverStorable5 [2025-03-16 13:26:08,396 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:08,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -628962765, now seen corresponding path program 2 times [2025-03-16 13:26:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793261296] [2025-03-16 13:26:08,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:26:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:08,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 116 statements into 2 equivalence classes. [2025-03-16 13:26:08,444 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-03-16 13:26:08,445 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:26:08,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-03-16 13:26:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793261296] [2025-03-16 13:26:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793261296] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854424849] [2025-03-16 13:26:08,667 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:26:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:08,669 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 13:26:08,671 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 13:26:08,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 116 statements into 2 equivalence classes. [2025-03-16 13:26:08,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-03-16 13:26:08,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:26:08,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:08,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:26:08,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-03-16 13:26:08,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-03-16 13:26:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854424849] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:08,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 13:26:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239537809] [2025-03-16 13:26:08,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:08,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:26:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:08,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:26:08,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:26:08,973 INFO L87 Difference]: Start difference. First operand 256 states and 363 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:26:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:09,314 INFO L93 Difference]: Finished difference Result 817 states and 1198 transitions. [2025-03-16 13:26:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:26:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2025-03-16 13:26:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:09,316 INFO L225 Difference]: With dead ends: 817 [2025-03-16 13:26:09,316 INFO L226 Difference]: Without dead ends: 573 [2025-03-16 13:26:09,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:26:09,319 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 728 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:09,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 148 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:26:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2025-03-16 13:26:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2025-03-16 13:26:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.4232804232804233) internal successors, (807), 567 states have internal predecessors, (807), 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 13:26:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 807 transitions. [2025-03-16 13:26:09,347 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 807 transitions. Word has length 116 [2025-03-16 13:26:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:09,349 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 807 transitions. [2025-03-16 13:26:09,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:26:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 807 transitions. [2025-03-16 13:26:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2025-03-16 13:26:09,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:09,352 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:09,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:26:09,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:09,560 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:09,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1191392333, now seen corresponding path program 3 times [2025-03-16 13:26:09,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:09,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009109575] [2025-03-16 13:26:09,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:26:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:09,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 248 statements into 23 equivalence classes. [2025-03-16 13:26:09,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 248 statements. [2025-03-16 13:26:09,612 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:26:09,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 169 refuted. 0 times theorem prover too weak. 2374 trivial. 0 not checked. [2025-03-16 13:26:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009109575] [2025-03-16 13:26:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009109575] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356753298] [2025-03-16 13:26:09,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:26:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:09,917 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 13:26:09,919 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 13:26:10,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 248 statements into 23 equivalence classes. [2025-03-16 13:26:10,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 248 statements. [2025-03-16 13:26:10,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:26:10,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:10,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:26:10,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:10,084 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 11 [2025-03-16 13:26:10,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:26:10,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2025-03-16 13:26:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 107 proven. 127 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2025-03-16 13:26:10,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:10,698 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 17 treesize of output 15 [2025-03-16 13:26:10,701 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 12 treesize of output 8 [2025-03-16 13:26:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 169 refuted. 0 times theorem prover too weak. 2374 trivial. 0 not checked. [2025-03-16 13:26:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356753298] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2025-03-16 13:26:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000508446] [2025-03-16 13:26:10,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:10,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:26:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:10,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:26:10,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:26:10,716 INFO L87 Difference]: Start difference. First operand 568 states and 807 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 13:26:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:11,028 INFO L93 Difference]: Finished difference Result 1323 states and 1800 transitions. [2025-03-16 13:26:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:26:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 248 [2025-03-16 13:26:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:11,036 INFO L225 Difference]: With dead ends: 1323 [2025-03-16 13:26:11,036 INFO L226 Difference]: Without dead ends: 1320 [2025-03-16 13:26:11,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 480 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:26:11,038 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 195 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:11,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 105 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:26:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2025-03-16 13:26:11,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1043. [2025-03-16 13:26:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.437619961612284) internal successors, (1498), 1042 states have internal predecessors, (1498), 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 13:26:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1498 transitions. [2025-03-16 13:26:11,087 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1498 transitions. Word has length 248 [2025-03-16 13:26:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:11,088 INFO L471 AbstractCegarLoop]: Abstraction has 1043 states and 1498 transitions. [2025-03-16 13:26:11,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 13:26:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1498 transitions. [2025-03-16 13:26:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2025-03-16 13:26:11,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:11,090 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:11,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:26:11,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:11,291 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:11,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1285589133, now seen corresponding path program 1 times [2025-03-16 13:26:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860408918] [2025-03-16 13:26:11,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:11,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 248 statements into 1 equivalence classes. [2025-03-16 13:26:11,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 248 of 248 statements. [2025-03-16 13:26:11,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:11,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-03-16 13:26:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860408918] [2025-03-16 13:26:12,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860408918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845972174] [2025-03-16 13:26:12,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:26:12,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:12,165 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 13:26:12,167 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 13:26:12,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 248 statements into 1 equivalence classes. [2025-03-16 13:26:12,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 248 of 248 statements. [2025-03-16 13:26:12,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:26:12,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:12,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:26:12,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-03-16 13:26:12,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-03-16 13:26:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845972174] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:12,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2025-03-16 13:26:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130403092] [2025-03-16 13:26:12,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:12,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-16 13:26:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:12,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-16 13:26:12,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:26:13,001 INFO L87 Difference]: Start difference. First operand 1043 states and 1498 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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 13:26:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:13,932 INFO L93 Difference]: Finished difference Result 3523 states and 5057 transitions. [2025-03-16 13:26:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:26:13,932 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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 248 [2025-03-16 13:26:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:13,941 INFO L225 Difference]: With dead ends: 3523 [2025-03-16 13:26:13,941 INFO L226 Difference]: Without dead ends: 2504 [2025-03-16 13:26:13,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:26:13,945 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 2080 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:13,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2080 Valid, 296 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:26:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2025-03-16 13:26:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2195. [2025-03-16 13:26:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.4375569735642661) internal successors, (3154), 2194 states have internal predecessors, (3154), 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 13:26:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3154 transitions. [2025-03-16 13:26:14,005 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3154 transitions. Word has length 248 [2025-03-16 13:26:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:14,005 INFO L471 AbstractCegarLoop]: Abstraction has 2195 states and 3154 transitions. [2025-03-16 13:26:14,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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 13:26:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3154 transitions. [2025-03-16 13:26:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2025-03-16 13:26:14,011 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:14,012 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:14,018 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 13:26:14,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:14,212 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:14,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -762545549, now seen corresponding path program 2 times [2025-03-16 13:26:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868476811] [2025-03-16 13:26:14,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:26:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:14,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 512 statements into 2 equivalence classes. [2025-03-16 13:26:14,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 512 of 512 statements. [2025-03-16 13:26:14,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:26:14,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-03-16 13:26:16,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868476811] [2025-03-16 13:26:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868476811] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834940404] [2025-03-16 13:26:16,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:26:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:16,674 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 13:26:16,676 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 13:26:16,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 512 statements into 2 equivalence classes. [2025-03-16 13:26:16,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 512 of 512 statements. [2025-03-16 13:26:16,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:26:16,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:16,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 13:26:16,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-03-16 13:26:17,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-03-16 13:26:18,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834940404] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:18,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:18,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2025-03-16 13:26:18,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406125120] [2025-03-16 13:26:18,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:18,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-16 13:26:18,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:18,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-16 13:26:18,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-16 13:26:18,914 INFO L87 Difference]: Start difference. First operand 2195 states and 3154 transitions. Second operand has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 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 13:26:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:23,319 INFO L93 Difference]: Finished difference Result 7243 states and 10409 transitions. [2025-03-16 13:26:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-16 13:26:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 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 512 [2025-03-16 13:26:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:23,332 INFO L225 Difference]: With dead ends: 7243 [2025-03-16 13:26:23,332 INFO L226 Difference]: Without dead ends: 5096 [2025-03-16 13:26:23,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-16 13:26:23,336 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 4693 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:23,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4693 Valid, 580 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:26:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2025-03-16 13:26:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4499. [2025-03-16 13:26:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 1.4375277901289463) internal successors, (6466), 4498 states have internal predecessors, (6466), 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 13:26:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6466 transitions. [2025-03-16 13:26:23,428 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6466 transitions. Word has length 512 [2025-03-16 13:26:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:23,428 INFO L471 AbstractCegarLoop]: Abstraction has 4499 states and 6466 transitions. [2025-03-16 13:26:23,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 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 13:26:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6466 transitions. [2025-03-16 13:26:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2025-03-16 13:26:23,451 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:23,451 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:23,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:26:23,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:23,652 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:23,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1966440333, now seen corresponding path program 3 times [2025-03-16 13:26:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123845672] [2025-03-16 13:26:23,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:26:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:23,762 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1040 statements into 95 equivalence classes. [2025-03-16 13:26:23,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 1040 statements. [2025-03-16 13:26:23,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:26:23,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 280 proven. 745 refuted. 0 times theorem prover too weak. 47338 trivial. 0 not checked. [2025-03-16 13:26:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123845672] [2025-03-16 13:26:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123845672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575590514] [2025-03-16 13:26:24,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:26:24,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:24,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:26:24,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:26:24,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1040 statements into 95 equivalence classes. [2025-03-16 13:26:24,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 1040 statements. [2025-03-16 13:26:24,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:26:24,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:24,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:26:24,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:26:24,385 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 11 [2025-03-16 13:26:25,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:26:25,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2025-03-16 13:26:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 652 proven. 280 refuted. 0 times theorem prover too weak. 47431 trivial. 0 not checked. [2025-03-16 13:26:25,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:26:25,797 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 17 treesize of output 15 [2025-03-16 13:26:25,799 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 12 treesize of output 8 [2025-03-16 13:26:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 280 proven. 652 refuted. 0 times theorem prover too weak. 47431 trivial. 0 not checked. [2025-03-16 13:26:25,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575590514] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:26:25,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:26:25,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 22 [2025-03-16 13:26:25,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503211913] [2025-03-16 13:26:25,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:26:25,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:26:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:26:25,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:26:25,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:26:25,814 INFO L87 Difference]: Start difference. First operand 4499 states and 6466 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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 13:26:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:26:26,114 INFO L93 Difference]: Finished difference Result 4970 states and 7029 transitions. [2025-03-16 13:26:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:26:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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 1040 [2025-03-16 13:26:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:26:26,127 INFO L225 Difference]: With dead ends: 4970 [2025-03-16 13:26:26,127 INFO L226 Difference]: Without dead ends: 4967 [2025-03-16 13:26:26,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 2066 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:26:26,130 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:26:26,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 88 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:26:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2025-03-16 13:26:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4489. [2025-03-16 13:26:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4488 states have (on average 1.4376114081996434) internal successors, (6452), 4488 states have internal predecessors, (6452), 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 13:26:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6452 transitions. [2025-03-16 13:26:26,227 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6452 transitions. Word has length 1040 [2025-03-16 13:26:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:26:26,229 INFO L471 AbstractCegarLoop]: Abstraction has 4489 states and 6452 transitions. [2025-03-16 13:26:26,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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 13:26:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6452 transitions. [2025-03-16 13:26:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2025-03-16 13:26:26,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:26:26,239 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:26:26,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:26:26,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:26,444 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:26:26,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:26:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1636985007, now seen corresponding path program 4 times [2025-03-16 13:26:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:26:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812676091] [2025-03-16 13:26:26,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:26:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:26:26,535 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1040 statements into 2 equivalence classes. [2025-03-16 13:26:26,994 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1040 of 1040 statements. [2025-03-16 13:26:26,995 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:26:26,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:26:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2025-03-16 13:26:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:26:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812676091] [2025-03-16 13:26:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812676091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:26:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485559921] [2025-03-16 13:26:35,088 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:26:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:26:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:26:35,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:26:35,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:26:35,407 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1040 statements into 2 equivalence classes.