./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-patterns/array4_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:39:55,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:39:55,521 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:39:55,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:39:55,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:39:55,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:39:55,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:39:55,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:39:55,549 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:39:55,550 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:39:55,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:39:55,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:39:55,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:39:55,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:39:55,551 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:39:55,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:39:55,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:39:55,551 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:39:55,552 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:39:55,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:39:55,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:39:55,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:39:55,553 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2025-03-08 00:39:55,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:39:55,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:39:55,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:39:55,763 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:39:55,763 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:39:55,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2025-03-08 00:39:56,858 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e944cab/ab94cd339c2647e788fffe0fad6b655c/FLAG449e275e8 [2025-03-08 00:39:57,073 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:39:57,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2025-03-08 00:39:57,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e944cab/ab94cd339c2647e788fffe0fad6b655c/FLAG449e275e8 [2025-03-08 00:39:57,094 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e944cab/ab94cd339c2647e788fffe0fad6b655c [2025-03-08 00:39:57,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:39:57,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:39:57,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:39:57,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:39:57,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:39:57,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f13129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57, skipping insertion in model container [2025-03-08 00:39:57,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,118 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:39:57,219 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-patterns/array4_pattern.c[1835,1848] [2025-03-08 00:39:57,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:39:57,245 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:39:57,253 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-patterns/array4_pattern.c[1835,1848] [2025-03-08 00:39:57,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:39:57,276 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:39:57,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57 WrapperNode [2025-03-08 00:39:57,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:39:57,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:39:57,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:39:57,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:39:57,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,310 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2025-03-08 00:39:57,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:39:57,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:39:57,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:39:57,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:39:57,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,328 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 4 writes are split as follows [0, 2, 2]. [2025-03-08 00:39:57,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,335 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:39:57,341 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:39:57,342 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:39:57,342 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:39:57,343 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (1/1) ... [2025-03-08 00:39:57,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:39:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:39:57,368 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) [2025-03-08 00:39:57,370 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 [2025-03-08 00:39:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:39:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 00:39:57,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 00:39:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:39:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:39:57,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 00:39:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:39:57,434 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:39:57,436 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:39:57,570 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L51: call ULTIMATE.dealloc(main_~#array1~0#1.base, main_~#array1~0#1.offset);havoc main_~#array1~0#1.base, main_~#array1~0#1.offset;call ULTIMATE.dealloc(main_~#array2~0#1.base, main_~#array2~0#1.offset);havoc main_~#array2~0#1.base, main_~#array2~0#1.offset; [2025-03-08 00:39:57,584 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-08 00:39:57,584 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:39:57,593 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:39:57,593 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:39:57,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:39:57 BoogieIcfgContainer [2025-03-08 00:39:57,594 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:39:57,596 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:39:57,596 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:39:57,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:39:57,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:39:57" (1/3) ... [2025-03-08 00:39:57,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc2fc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:39:57, skipping insertion in model container [2025-03-08 00:39:57,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:39:57" (2/3) ... [2025-03-08 00:39:57,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc2fc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:39:57, skipping insertion in model container [2025-03-08 00:39:57,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:39:57" (3/3) ... [2025-03-08 00:39:57,601 INFO L128 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2025-03-08 00:39:57,611 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:39:57,612 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array4_pattern.c that has 2 procedures, 29 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 00:39:57,650 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:39:57,657 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;@4c9b26c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:39:57,657 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:39:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:39:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 00:39:57,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:57,663 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:57,664 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:39:57,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:39:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 785833607, now seen corresponding path program 1 times [2025-03-08 00:39:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:39:57,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449035252] [2025-03-08 00:39:57,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:39:57,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 00:39:57,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 00:39:57,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:57,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:39:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:39:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:39:57,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449035252] [2025-03-08 00:39:57,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449035252] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:39:57,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:39:57,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 00:39:57,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496174308] [2025-03-08 00:39:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:39:57,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 00:39:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:39:57,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 00:39:57,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:39:57,778 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 00:39:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:39:57,788 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2025-03-08 00:39:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 00:39:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-03-08 00:39:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:39:57,793 INFO L225 Difference]: With dead ends: 55 [2025-03-08 00:39:57,793 INFO L226 Difference]: Without dead ends: 25 [2025-03-08 00:39:57,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:39:57,796 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:39:57,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:39:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-08 00:39:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-08 00:39:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:39:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2025-03-08 00:39:57,827 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2025-03-08 00:39:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:39:57,827 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2025-03-08 00:39:57,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 00:39:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2025-03-08 00:39:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 00:39:57,829 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:57,829 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:57,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:39:57,829 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:39:57,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:39:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1348052989, now seen corresponding path program 1 times [2025-03-08 00:39:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:39:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138197670] [2025-03-08 00:39:57,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:39:57,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 00:39:57,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 00:39:57,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:57,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:39:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:39:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:39:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138197670] [2025-03-08 00:39:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138197670] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:39:57,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:39:57,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:39:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619596523] [2025-03-08 00:39:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:39:57,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:39:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:39:57,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:39:57,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:39:57,977 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:39:58,013 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2025-03-08 00:39:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:39:58,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-03-08 00:39:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:39:58,014 INFO L225 Difference]: With dead ends: 55 [2025-03-08 00:39:58,015 INFO L226 Difference]: Without dead ends: 35 [2025-03-08 00:39:58,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:39:58,015 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:39:58,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:39:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-08 00:39:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2025-03-08 00:39:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 00:39:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-08 00:39:58,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 40 [2025-03-08 00:39:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:39:58,023 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-08 00:39:58,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-08 00:39:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 00:39:58,024 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:58,024 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:58,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:39:58,024 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:39:58,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:39:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2059410626, now seen corresponding path program 1 times [2025-03-08 00:39:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:39:58,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759333726] [2025-03-08 00:39:58,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:39:58,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 00:39:58,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 00:39:58,060 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:58,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:39:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:39:58,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:39:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759333726] [2025-03-08 00:39:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759333726] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:39:58,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:39:58,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:39:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335775790] [2025-03-08 00:39:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:39:58,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:39:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:39:58,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:39:58,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:39:58,161 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:39:58,174 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2025-03-08 00:39:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:39:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-03-08 00:39:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:39:58,175 INFO L225 Difference]: With dead ends: 38 [2025-03-08 00:39:58,175 INFO L226 Difference]: Without dead ends: 35 [2025-03-08 00:39:58,175 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 [2025-03-08 00:39:58,176 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:39:58,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:39:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-08 00:39:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-08 00:39:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 00:39:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2025-03-08 00:39:58,184 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 40 [2025-03-08 00:39:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:39:58,184 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2025-03-08 00:39:58,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2025-03-08 00:39:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 00:39:58,185 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:58,185 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:58,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 00:39:58,185 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:39:58,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:39:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 582811787, now seen corresponding path program 1 times [2025-03-08 00:39:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:39:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300291560] [2025-03-08 00:39:58,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:39:58,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 00:39:58,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 00:39:58,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:58,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:39:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:39:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:39:58,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300291560] [2025-03-08 00:39:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300291560] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:39:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:39:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 00:39:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859649173] [2025-03-08 00:39:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:39:58,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 00:39:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:39:58,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 00:39:58,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:39:58,335 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:39:58,391 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2025-03-08 00:39:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:39:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2025-03-08 00:39:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:39:58,392 INFO L225 Difference]: With dead ends: 68 [2025-03-08 00:39:58,392 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 00:39:58,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:39:58,393 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:39:58,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:39:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 00:39:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-03-08 00:39:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 00:39:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-08 00:39:58,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 41 [2025-03-08 00:39:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:39:58,404 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-08 00:39:58,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 00:39:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-08 00:39:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 00:39:58,405 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:58,405 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:58,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 00:39:58,405 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:39:58,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:39:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 787279745, now seen corresponding path program 1 times [2025-03-08 00:39:58,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:39:58,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807394889] [2025-03-08 00:39:58,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:39:58,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 00:39:58,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:39:58,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:58,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:39:58,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686189785] [2025-03-08 00:39:58,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:39:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:39:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:39:58,449 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) [2025-03-08 00:39:58,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:39:58,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 00:39:58,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:39:58,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:39:58,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:39:58,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 00:39:58,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:39:58,590 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 11 treesize of output 7 [2025-03-08 00:39:59,176 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2025-03-08 00:39:59,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 39 [2025-03-08 00:39:59,185 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 11 treesize of output 9 [2025-03-08 00:39:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:39:59,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:39:59,350 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 34 treesize of output 32 [2025-03-08 00:39:59,354 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 56 treesize of output 54 [2025-03-08 00:39:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:39:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807394889] [2025-03-08 00:39:59,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:39:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686189785] [2025-03-08 00:39:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686189785] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:39:59,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:39:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-08 00:39:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296355664] [2025-03-08 00:39:59,681 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:39:59,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:39:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:39:59,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:39:59,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:39:59,682 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:39:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:39:59,932 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2025-03-08 00:39:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:39:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2025-03-08 00:39:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:39:59,934 INFO L225 Difference]: With dead ends: 74 [2025-03-08 00:39:59,934 INFO L226 Difference]: Without dead ends: 71 [2025-03-08 00:39:59,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:39:59,935 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:39:59,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 164 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:39:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-08 00:39:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2025-03-08 00:39:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 00:39:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2025-03-08 00:39:59,948 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 42 [2025-03-08 00:39:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:39:59,948 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2025-03-08 00:39:59,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:39:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2025-03-08 00:39:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:39:59,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:39:59,949 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:39:59,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:00,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:00,150 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:00,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1364099928, now seen corresponding path program 2 times [2025-03-08 00:40:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:00,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281905579] [2025-03-08 00:40:00,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:00,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 00:40:00,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:40:00,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:00,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281905579] [2025-03-08 00:40:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281905579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:00,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237400393] [2025-03-08 00:40:00,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:00,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:00,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:00,250 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) [2025-03-08 00:40:00,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:40:00,282 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 00:40:00,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:40:00,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:00,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:00,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:40:00,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:00,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237400393] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:00,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:00,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-08 00:40:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073407749] [2025-03-08 00:40:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:00,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:40:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:00,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:40:00,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:40:00,413 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:00,528 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2025-03-08 00:40:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:40:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2025-03-08 00:40:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:00,529 INFO L225 Difference]: With dead ends: 132 [2025-03-08 00:40:00,529 INFO L226 Difference]: Without dead ends: 108 [2025-03-08 00:40:00,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:40:00,530 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:00,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 108 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:40:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-08 00:40:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2025-03-08 00:40:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 68 states have internal predecessors, (76), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2025-03-08 00:40:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2025-03-08 00:40:00,542 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 43 [2025-03-08 00:40:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:00,542 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2025-03-08 00:40:00,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2025-03-08 00:40:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:40:00,543 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:00,543 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:00,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:00,746 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 [2025-03-08 00:40:00,746 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:00,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1464148149, now seen corresponding path program 3 times [2025-03-08 00:40:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:00,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100286460] [2025-03-08 00:40:00,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:00,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 6 equivalence classes. [2025-03-08 00:40:00,787 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:40:00,787 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:40:00,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100286460] [2025-03-08 00:40:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100286460] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484778562] [2025-03-08 00:40:00,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:00,862 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) [2025-03-08 00:40:00,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:40:00,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 6 equivalence classes. [2025-03-08 00:40:00,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 41 of 43 statements. [2025-03-08 00:40:00,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:40:00,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:00,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 00:40:00,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:01,127 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 [2025-03-08 00:40:01,135 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 13 [2025-03-08 00:40:01,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:01,278 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 25 treesize of output 21 [2025-03-08 00:40:01,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:01,290 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 28 treesize of output 24 [2025-03-08 00:40:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:40:01,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:01,442 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 34 treesize of output 32 [2025-03-08 00:40:01,445 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 32 treesize of output 30 [2025-03-08 00:40:01,447 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 49 treesize of output 47 [2025-03-08 00:40:01,450 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 68 treesize of output 64 [2025-03-08 00:40:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 00:40:01,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484778562] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:01,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:01,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 12] total 30 [2025-03-08 00:40:01,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634049886] [2025-03-08 00:40:01,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:01,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 00:40:01,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:01,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 00:40:01,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2025-03-08 00:40:01,678 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-08 00:40:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:02,924 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2025-03-08 00:40:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 00:40:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) Word has length 43 [2025-03-08 00:40:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:02,926 INFO L225 Difference]: With dead ends: 133 [2025-03-08 00:40:02,926 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 00:40:02,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=3123, Unknown=0, NotChecked=0, Total=3782 [2025-03-08 00:40:02,928 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:02,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 328 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:40:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 00:40:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2025-03-08 00:40:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 00:40:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2025-03-08 00:40:02,936 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 43 [2025-03-08 00:40:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:02,936 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2025-03-08 00:40:02,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-08 00:40:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2025-03-08 00:40:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 00:40:02,937 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:02,937 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:02,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:40:03,141 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 [2025-03-08 00:40:03,141 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:03,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1856079390, now seen corresponding path program 4 times [2025-03-08 00:40:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:03,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847511481] [2025-03-08 00:40:03,142 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:03,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:03,147 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:40:03,184 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:40:03,186 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:03,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:03,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472776049] [2025-03-08 00:40:03,188 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:03,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:03,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:03,190 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) [2025-03-08 00:40:03,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:40:03,225 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:40:03,247 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:40:03,247 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:03,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:03,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 00:40:03,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:03,276 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 11 treesize of output 7 [2025-03-08 00:40:03,281 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 11 treesize of output 7 [2025-03-08 00:40:03,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:03,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:03,994 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2025-03-08 00:40:03,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2025-03-08 00:40:04,056 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2025-03-08 00:40:04,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2025-03-08 00:40:04,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:04,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2025-03-08 00:40:04,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:04,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2025-03-08 00:40:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:04,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:04,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847511481] [2025-03-08 00:40:04,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472776049] [2025-03-08 00:40:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472776049] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-08 00:40:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173540034] [2025-03-08 00:40:04,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:04,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 00:40:04,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:04,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 00:40:04,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:40:04,540 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:04,807 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2025-03-08 00:40:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:40:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2025-03-08 00:40:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:04,808 INFO L225 Difference]: With dead ends: 86 [2025-03-08 00:40:04,808 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 00:40:04,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:40:04,809 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:04,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:40:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 00:40:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2025-03-08 00:40:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 52 states have internal predecessors, (58), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-08 00:40:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2025-03-08 00:40:04,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 44 [2025-03-08 00:40:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:04,824 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2025-03-08 00:40:04,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2025-03-08 00:40:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:40:04,825 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:04,825 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:04,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:40:05,026 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 [2025-03-08 00:40:05,026 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:05,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1703917995, now seen corresponding path program 5 times [2025-03-08 00:40:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319912510] [2025-03-08 00:40:05,026 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:05,034 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 6 equivalence classes. [2025-03-08 00:40:05,057 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:40:05,058 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 00:40:05,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:05,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:05,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319912510] [2025-03-08 00:40:05,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319912510] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:05,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345138726] [2025-03-08 00:40:05,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:05,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:05,147 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) [2025-03-08 00:40:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:40:05,181 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 6 equivalence classes. [2025-03-08 00:40:05,199 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:40:05,199 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 00:40:05,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:05,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:40:05,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:05,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345138726] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:05,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:05,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-08 00:40:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263819050] [2025-03-08 00:40:05,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:05,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 00:40:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:05,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 00:40:05,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:40:05,292 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:05,455 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2025-03-08 00:40:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:40:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 45 [2025-03-08 00:40:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:05,456 INFO L225 Difference]: With dead ends: 170 [2025-03-08 00:40:05,456 INFO L226 Difference]: Without dead ends: 133 [2025-03-08 00:40:05,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:40:05,457 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:05,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 158 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:40:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-03-08 00:40:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2025-03-08 00:40:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2025-03-08 00:40:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2025-03-08 00:40:05,483 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 45 [2025-03-08 00:40:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:05,483 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2025-03-08 00:40:05,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2025-03-08 00:40:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:40:05,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:05,484 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:05,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:05,684 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 [2025-03-08 00:40:05,684 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:05,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1397576856, now seen corresponding path program 6 times [2025-03-08 00:40:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170880157] [2025-03-08 00:40:05,685 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:05,692 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 7 equivalence classes. [2025-03-08 00:40:05,709 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 40 of 45 statements. [2025-03-08 00:40:05,709 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 00:40:05,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170880157] [2025-03-08 00:40:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170880157] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612834889] [2025-03-08 00:40:05,805 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:05,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:05,806 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) [2025-03-08 00:40:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:40:05,840 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 7 equivalence classes. [2025-03-08 00:40:05,890 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 40 of 45 statements. [2025-03-08 00:40:05,891 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 00:40:05,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:05,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:40:05,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:05,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:05,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612834889] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:05,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:05,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-03-08 00:40:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748911291] [2025-03-08 00:40:05,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:05,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:40:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:05,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:40:05,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:40:05,985 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:06,169 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2025-03-08 00:40:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:40:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 45 [2025-03-08 00:40:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:06,171 INFO L225 Difference]: With dead ends: 134 [2025-03-08 00:40:06,171 INFO L226 Difference]: Without dead ends: 131 [2025-03-08 00:40:06,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:40:06,171 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:06,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 225 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:40:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-08 00:40:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2025-03-08 00:40:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 86 states have internal predecessors, (96), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2025-03-08 00:40:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2025-03-08 00:40:06,195 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 45 [2025-03-08 00:40:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:06,195 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2025-03-08 00:40:06,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2025-03-08 00:40:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 00:40:06,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:06,196 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:06,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 00:40:06,396 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 [2025-03-08 00:40:06,397 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:06,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash -375177823, now seen corresponding path program 7 times [2025-03-08 00:40:06,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:06,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080759684] [2025-03-08 00:40:06,397 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:06,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:06,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 00:40:06,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:40:06,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:06,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:06,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133004561] [2025-03-08 00:40:06,430 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:06,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:06,432 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) [2025-03-08 00:40:06,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:40:06,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 00:40:06,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:40:06,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:06,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:06,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-08 00:40:06,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:06,519 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 11 treesize of output 7 [2025-03-08 00:40:06,524 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 11 treesize of output 7 [2025-03-08 00:40:06,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:06,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:06,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:06,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:06,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:06,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:07,688 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2025-03-08 00:40:07,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2025-03-08 00:40:07,763 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2025-03-08 00:40:07,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2025-03-08 00:40:08,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:08,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 58 [2025-03-08 00:40:08,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:08,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 75 [2025-03-08 00:40:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:40:08,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080759684] [2025-03-08 00:40:09,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133004561] [2025-03-08 00:40:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133004561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2025-03-08 00:40:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567234557] [2025-03-08 00:40:09,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:09,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:40:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:09,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:40:09,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:40:09,073 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand has 23 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:09,740 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2025-03-08 00:40:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:40:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2025-03-08 00:40:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:09,742 INFO L225 Difference]: With dead ends: 159 [2025-03-08 00:40:09,742 INFO L226 Difference]: Without dead ends: 156 [2025-03-08 00:40:09,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 00:40:09,743 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:09,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 237 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:40:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-08 00:40:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2025-03-08 00:40:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 99 states have internal predecessors, (111), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2025-03-08 00:40:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2025-03-08 00:40:09,767 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 46 [2025-03-08 00:40:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:09,768 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2025-03-08 00:40:09,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2025-03-08 00:40:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 00:40:09,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:09,768 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:09,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:09,973 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 [2025-03-08 00:40:09,973 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:09,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1254421128, now seen corresponding path program 8 times [2025-03-08 00:40:09,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:09,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742888191] [2025-03-08 00:40:09,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:09,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 00:40:09,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:40:09,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:09,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742888191] [2025-03-08 00:40:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742888191] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654392379] [2025-03-08 00:40:10,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:10,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:10,095 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) [2025-03-08 00:40:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:40:10,133 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 00:40:10,147 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:40:10,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:10,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:10,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:40:10,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:10,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654392379] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:10,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:40:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086360038] [2025-03-08 00:40:10,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:10,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:40:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:10,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:40:10,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:40:10,277 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:10,520 INFO L93 Difference]: Finished difference Result 332 states and 443 transitions. [2025-03-08 00:40:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:40:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2025-03-08 00:40:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:10,523 INFO L225 Difference]: With dead ends: 332 [2025-03-08 00:40:10,525 INFO L226 Difference]: Without dead ends: 241 [2025-03-08 00:40:10,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:40:10,526 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 175 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:10,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 237 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:40:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2025-03-08 00:40:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 212. [2025-03-08 00:40:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-08 00:40:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 284 transitions. [2025-03-08 00:40:10,559 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 284 transitions. Word has length 47 [2025-03-08 00:40:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:10,560 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 284 transitions. [2025-03-08 00:40:10,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 284 transitions. [2025-03-08 00:40:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 00:40:10,560 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:10,560 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:10,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 00:40:10,761 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:10,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -402638741, now seen corresponding path program 9 times [2025-03-08 00:40:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:10,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778711864] [2025-03-08 00:40:10,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:10,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 7 equivalence classes. [2025-03-08 00:40:10,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:40:10,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 00:40:10,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:10,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778711864] [2025-03-08 00:40:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778711864] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760255719] [2025-03-08 00:40:10,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:10,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:10,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:40:10,947 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 7 equivalence classes. [2025-03-08 00:40:10,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:40:10,977 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 00:40:10,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:10,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:40:10,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:11,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760255719] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:11,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:11,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:40:11,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498650622] [2025-03-08 00:40:11,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:11,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:40:11,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:11,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:40:11,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:40:11,110 INFO L87 Difference]: Start difference. First operand 212 states and 284 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:11,361 INFO L93 Difference]: Finished difference Result 230 states and 301 transitions. [2025-03-08 00:40:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 00:40:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2025-03-08 00:40:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:11,363 INFO L225 Difference]: With dead ends: 230 [2025-03-08 00:40:11,363 INFO L226 Difference]: Without dead ends: 227 [2025-03-08 00:40:11,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:40:11,363 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 96 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:11,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 316 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:40:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2025-03-08 00:40:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2025-03-08 00:40:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 144 states have (on average 1.1319444444444444) internal successors, (163), 145 states have internal predecessors, (163), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-08 00:40:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 285 transitions. [2025-03-08 00:40:11,391 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 285 transitions. Word has length 47 [2025-03-08 00:40:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:11,391 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 285 transitions. [2025-03-08 00:40:11,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 285 transitions. [2025-03-08 00:40:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 00:40:11,392 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:11,392 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:11,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 00:40:11,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 00:40:11,593 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:11,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 403132670, now seen corresponding path program 10 times [2025-03-08 00:40:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:11,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633134458] [2025-03-08 00:40:11,593 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:11,599 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-08 00:40:11,621 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:40:11,621 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:11,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998785398] [2025-03-08 00:40:11,622 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:11,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:11,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:11,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:40:11,669 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-08 00:40:11,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:40:11,762 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:11,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:11,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-03-08 00:40:11,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:11,790 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 11 treesize of output 7 [2025-03-08 00:40:11,794 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 11 treesize of output 7 [2025-03-08 00:40:11,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:11,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:11,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:11,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:11,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:11,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:11,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:11,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:11,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:11,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:13,060 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2025-03-08 00:40:13,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2025-03-08 00:40:13,162 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2025-03-08 00:40:13,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2025-03-08 00:40:14,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:14,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 76 [2025-03-08 00:40:14,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:14,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 117 [2025-03-08 00:40:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:14,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:15,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:15,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633134458] [2025-03-08 00:40:15,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:15,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998785398] [2025-03-08 00:40:15,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998785398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:15,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:15,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-03-08 00:40:15,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071377468] [2025-03-08 00:40:15,103 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:15,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 00:40:15,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:15,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 00:40:15,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 00:40:15,105 INFO L87 Difference]: Start difference. First operand 213 states and 285 transitions. Second operand has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:15,822 INFO L93 Difference]: Finished difference Result 250 states and 332 transitions. [2025-03-08 00:40:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:40:15,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2025-03-08 00:40:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:15,824 INFO L225 Difference]: With dead ends: 250 [2025-03-08 00:40:15,824 INFO L226 Difference]: Without dead ends: 239 [2025-03-08 00:40:15,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 00:40:15,827 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:15,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 277 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 00:40:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-03-08 00:40:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2025-03-08 00:40:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 156 states have internal predecessors, (175), 65 states have call successors, (65), 8 states have call predecessors, (65), 8 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2025-03-08 00:40:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 305 transitions. [2025-03-08 00:40:15,862 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 305 transitions. Word has length 48 [2025-03-08 00:40:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:15,863 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 305 transitions. [2025-03-08 00:40:15,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 305 transitions. [2025-03-08 00:40:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 00:40:15,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:15,864 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:15,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 00:40:16,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 00:40:16,064 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:16,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash -217005752, now seen corresponding path program 11 times [2025-03-08 00:40:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:16,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067612340] [2025-03-08 00:40:16,065 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:16,071 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 8 equivalence classes. [2025-03-08 00:40:16,098 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:40:16,098 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-08 00:40:16,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067612340] [2025-03-08 00:40:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067612340] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403833643] [2025-03-08 00:40:16,228 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:16,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:16,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:16,231 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:16,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:40:16,274 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 8 equivalence classes. [2025-03-08 00:40:16,367 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:40:16,367 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-08 00:40:16,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:16,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:40:16,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:16,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:16,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403833643] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:16,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:16,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-08 00:40:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093832170] [2025-03-08 00:40:16,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:16,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:40:16,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:16,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:40:16,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:40:16,506 INFO L87 Difference]: Start difference. First operand 229 states and 305 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:16,895 INFO L93 Difference]: Finished difference Result 375 states and 498 transitions. [2025-03-08 00:40:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:40:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 49 [2025-03-08 00:40:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:16,898 INFO L225 Difference]: With dead ends: 375 [2025-03-08 00:40:16,898 INFO L226 Difference]: Without dead ends: 318 [2025-03-08 00:40:16,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-03-08 00:40:16,899 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 102 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:16,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 505 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:40:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2025-03-08 00:40:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 290. [2025-03-08 00:40:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 195 states have (on average 1.1333333333333333) internal successors, (221), 196 states have internal predecessors, (221), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2025-03-08 00:40:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 391 transitions. [2025-03-08 00:40:16,941 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 391 transitions. Word has length 49 [2025-03-08 00:40:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:16,941 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 391 transitions. [2025-03-08 00:40:16,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 391 transitions. [2025-03-08 00:40:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 00:40:16,942 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:16,942 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:16,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:17,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 00:40:17,147 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:17,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1862788033, now seen corresponding path program 12 times [2025-03-08 00:40:17,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:17,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321100360] [2025-03-08 00:40:17,148 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:17,153 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 8 equivalence classes. [2025-03-08 00:40:17,197 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:40:17,198 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-08 00:40:17,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253790025] [2025-03-08 00:40:17,199 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:17,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:17,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:17,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:17,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:40:17,255 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 8 equivalence classes. [2025-03-08 00:40:17,422 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:40:17,422 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-08 00:40:17,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:17,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 86 conjuncts are in the unsatisfiable core [2025-03-08 00:40:17,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:17,446 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 11 treesize of output 7 [2025-03-08 00:40:17,455 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 11 treesize of output 7 [2025-03-08 00:40:17,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:17,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:17,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:17,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:17,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:17,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:17,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:17,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:17,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:18,751 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2025-03-08 00:40:18,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2025-03-08 00:40:18,882 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2025-03-08 00:40:18,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2025-03-08 00:40:21,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:21,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 225 treesize of output 159 [2025-03-08 00:40:21,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:21,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 462 treesize of output 276 [2025-03-08 00:40:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:22,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321100360] [2025-03-08 00:40:25,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253790025] [2025-03-08 00:40:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253790025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:25,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:25,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-03-08 00:40:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471457751] [2025-03-08 00:40:25,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:25,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 00:40:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:25,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 00:40:25,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2025-03-08 00:40:25,080 INFO L87 Difference]: Start difference. First operand 290 states and 391 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:26,068 INFO L93 Difference]: Finished difference Result 313 states and 420 transitions. [2025-03-08 00:40:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:40:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2025-03-08 00:40:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:26,071 INFO L225 Difference]: With dead ends: 313 [2025-03-08 00:40:26,071 INFO L226 Difference]: Without dead ends: 310 [2025-03-08 00:40:26,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 00:40:26,072 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:26,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 290 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:40:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2025-03-08 00:40:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 296. [2025-03-08 00:40:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 201 states have (on average 1.1343283582089552) internal successors, (228), 201 states have internal predecessors, (228), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2025-03-08 00:40:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 398 transitions. [2025-03-08 00:40:26,127 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 398 transitions. Word has length 50 [2025-03-08 00:40:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:26,128 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 398 transitions. [2025-03-08 00:40:26,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 398 transitions. [2025-03-08 00:40:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 00:40:26,128 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:26,128 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:26,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 00:40:26,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 00:40:26,329 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:26,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1911885928, now seen corresponding path program 13 times [2025-03-08 00:40:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373357708] [2025-03-08 00:40:26,330 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:26,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:40:26,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:40:26,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:26,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:26,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:26,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373357708] [2025-03-08 00:40:26,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373357708] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774138103] [2025-03-08 00:40:26,485 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:26,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:26,487 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:40:26,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:40:26,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:40:26,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:26,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:26,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:40:26,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:26,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:26,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774138103] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:26,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:26,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:40:26,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802231450] [2025-03-08 00:40:26,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:26,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:40:26,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:26,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:40:26,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:40:26,773 INFO L87 Difference]: Start difference. First operand 296 states and 398 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:27,346 INFO L93 Difference]: Finished difference Result 861 states and 1174 transitions. [2025-03-08 00:40:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:40:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2025-03-08 00:40:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:27,350 INFO L225 Difference]: With dead ends: 861 [2025-03-08 00:40:27,350 INFO L226 Difference]: Without dead ends: 634 [2025-03-08 00:40:27,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 83 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:40:27,351 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 647 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:27,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 303 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:40:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2025-03-08 00:40:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 490. [2025-03-08 00:40:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 329 states have (on average 1.1367781155015197) internal successors, (374), 329 states have internal predecessors, (374), 149 states have call successors, (149), 11 states have call predecessors, (149), 11 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2025-03-08 00:40:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 672 transitions. [2025-03-08 00:40:27,444 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 672 transitions. Word has length 51 [2025-03-08 00:40:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:27,445 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 672 transitions. [2025-03-08 00:40:27,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 672 transitions. [2025-03-08 00:40:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 00:40:27,447 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:27,447 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:27,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:27,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 00:40:27,647 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:27,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash 22496222, now seen corresponding path program 14 times [2025-03-08 00:40:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:27,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969988712] [2025-03-08 00:40:27,648 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:27,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:27,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 00:40:27,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:40:27,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:27,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:27,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650441398] [2025-03-08 00:40:27,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:27,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:27,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:27,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:40:27,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 00:40:27,834 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:40:27,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:27,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:27,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 108 conjuncts are in the unsatisfiable core [2025-03-08 00:40:27,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:27,855 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 11 treesize of output 7 [2025-03-08 00:40:27,858 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 11 treesize of output 7 [2025-03-08 00:40:27,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:27,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:27,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:27,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:27,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:27,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:27,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:27,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:27,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:27,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:28,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:28,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:28,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:28,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:28,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:28,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:28,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:28,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:29,718 INFO L349 Elim1Store]: treesize reduction 264, result has 33.5 percent of original size [2025-03-08 00:40:29,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 180 [2025-03-08 00:40:29,886 INFO L349 Elim1Store]: treesize reduction 240, result has 35.7 percent of original size [2025-03-08 00:40:29,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 178 [2025-03-08 00:40:32,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:32,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2025-03-08 00:40:32,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:32,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 489 treesize of output 241 [2025-03-08 00:40:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:32,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969988712] [2025-03-08 00:40:34,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650441398] [2025-03-08 00:40:34,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650441398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:34,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2025-03-08 00:40:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692605998] [2025-03-08 00:40:34,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:34,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 00:40:34,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:34,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 00:40:34,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:40:34,527 INFO L87 Difference]: Start difference. First operand 490 states and 672 transitions. Second operand has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:35,761 INFO L93 Difference]: Finished difference Result 527 states and 718 transitions. [2025-03-08 00:40:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:40:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2025-03-08 00:40:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:35,764 INFO L225 Difference]: With dead ends: 527 [2025-03-08 00:40:35,764 INFO L226 Difference]: Without dead ends: 524 [2025-03-08 00:40:35,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 00:40:35,765 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:35,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 311 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-08 00:40:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2025-03-08 00:40:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2025-03-08 00:40:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 342 states have (on average 1.1374269005847952) internal successors, (389), 342 states have internal predecessors, (389), 153 states have call successors, (153), 12 states have call predecessors, (153), 12 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2025-03-08 00:40:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 695 transitions. [2025-03-08 00:40:35,847 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 695 transitions. Word has length 52 [2025-03-08 00:40:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:35,847 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 695 transitions. [2025-03-08 00:40:35,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 695 transitions. [2025-03-08 00:40:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-08 00:40:35,848 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:35,848 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:35,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 00:40:36,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:36,053 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:36,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 697414635, now seen corresponding path program 15 times [2025-03-08 00:40:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630988116] [2025-03-08 00:40:36,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:36,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 8 equivalence classes. [2025-03-08 00:40:36,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:40:36,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-08 00:40:36,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630988116] [2025-03-08 00:40:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630988116] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643185630] [2025-03-08 00:40:36,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:40:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:36,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:36,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:40:36,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 8 equivalence classes. [2025-03-08 00:40:36,403 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:40:36,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-08 00:40:36,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:36,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:40:36,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:36,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643185630] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:36,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-03-08 00:40:36,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853603090] [2025-03-08 00:40:36,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:36,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 00:40:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:36,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 00:40:36,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2025-03-08 00:40:36,656 INFO L87 Difference]: Start difference. First operand 508 states and 695 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:37,647 INFO L93 Difference]: Finished difference Result 1290 states and 1764 transitions. [2025-03-08 00:40:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 00:40:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 53 [2025-03-08 00:40:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:37,652 INFO L225 Difference]: With dead ends: 1290 [2025-03-08 00:40:37,652 INFO L226 Difference]: Without dead ends: 907 [2025-03-08 00:40:37,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2025-03-08 00:40:37,653 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 944 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:37,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 402 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 00:40:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2025-03-08 00:40:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 644. [2025-03-08 00:40:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 429 states have (on average 1.1375291375291374) internal successors, (488), 429 states have internal predecessors, (488), 201 states have call successors, (201), 13 states have call predecessors, (201), 13 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2025-03-08 00:40:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 890 transitions. [2025-03-08 00:40:37,766 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 890 transitions. Word has length 53 [2025-03-08 00:40:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:37,766 INFO L471 AbstractCegarLoop]: Abstraction has 644 states and 890 transitions. [2025-03-08 00:40:37,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 890 transitions. [2025-03-08 00:40:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-08 00:40:37,767 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:37,767 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:37,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:37,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:37,971 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:37,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1580957480, now seen corresponding path program 16 times [2025-03-08 00:40:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:37,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106347152] [2025-03-08 00:40:37,971 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:37,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:37,978 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-08 00:40:37,991 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:40:37,991 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:37,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106347152] [2025-03-08 00:40:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106347152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733047945] [2025-03-08 00:40:38,155 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:40:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:38,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:38,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:40:38,219 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-08 00:40:38,331 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:40:38,331 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:40:38,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:38,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:40:38,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:38,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:38,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733047945] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:38,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:38,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2025-03-08 00:40:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36881656] [2025-03-08 00:40:38,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:38,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:40:38,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:38,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:40:38,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:40:38,587 INFO L87 Difference]: Start difference. First operand 644 states and 890 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:39,307 INFO L93 Difference]: Finished difference Result 708 states and 955 transitions. [2025-03-08 00:40:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:40:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 53 [2025-03-08 00:40:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:39,310 INFO L225 Difference]: With dead ends: 708 [2025-03-08 00:40:39,311 INFO L226 Difference]: Without dead ends: 705 [2025-03-08 00:40:39,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:40:39,311 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 120 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:39,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 799 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:40:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2025-03-08 00:40:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 640. [2025-03-08 00:40:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 425 states have (on average 1.1364705882352941) internal successors, (483), 426 states have internal predecessors, (483), 201 states have call successors, (201), 13 states have call predecessors, (201), 13 states have return successors, (201), 200 states have call predecessors, (201), 201 states have call successors, (201) [2025-03-08 00:40:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 885 transitions. [2025-03-08 00:40:39,419 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 885 transitions. Word has length 53 [2025-03-08 00:40:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:39,420 INFO L471 AbstractCegarLoop]: Abstraction has 640 states and 885 transitions. [2025-03-08 00:40:39,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 885 transitions. [2025-03-08 00:40:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 00:40:39,421 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:39,421 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:39,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:39,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:39,621 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:39,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1765073377, now seen corresponding path program 17 times [2025-03-08 00:40:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240490926] [2025-03-08 00:40:39,622 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:39,628 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 9 equivalence classes. [2025-03-08 00:40:39,668 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:40:39,669 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:40:39,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:39,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024386345] [2025-03-08 00:40:39,670 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:40:39,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:39,672 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:39,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 00:40:39,728 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 9 equivalence classes. [2025-03-08 00:40:39,970 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:40:39,970 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:40:39,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:39,973 WARN L254 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 124 conjuncts are in the unsatisfiable core [2025-03-08 00:40:39,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:40,003 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 11 treesize of output 7 [2025-03-08 00:40:40,009 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 11 treesize of output 7 [2025-03-08 00:40:40,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:40,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:40,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:40,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:40,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:40,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:40,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:40,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:40,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:40,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:40,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:40:40,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:40,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:40:42,657 INFO L349 Elim1Store]: treesize reduction 308, result has 33.5 percent of original size [2025-03-08 00:40:42,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 208 [2025-03-08 00:40:42,921 INFO L349 Elim1Store]: treesize reduction 280, result has 35.6 percent of original size [2025-03-08 00:40:42,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 206 [2025-03-08 00:40:47,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:47,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 330 treesize of output 166 [2025-03-08 00:40:47,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:47,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 468 treesize of output 276 [2025-03-08 00:40:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:40:47,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:49,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240490926] [2025-03-08 00:40:49,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:40:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024386345] [2025-03-08 00:40:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024386345] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:49,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2025-03-08 00:40:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801957202] [2025-03-08 00:40:49,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:49,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 00:40:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:49,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 00:40:49,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2407, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 00:40:49,638 INFO L87 Difference]: Start difference. First operand 640 states and 885 transitions. Second operand has 34 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:53,735 INFO L93 Difference]: Finished difference Result 683 states and 937 transitions. [2025-03-08 00:40:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-08 00:40:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2025-03-08 00:40:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:53,739 INFO L225 Difference]: With dead ends: 683 [2025-03-08 00:40:53,739 INFO L226 Difference]: Without dead ends: 680 [2025-03-08 00:40:53,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2025-03-08 00:40:53,741 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 95 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:53,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 304 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-08 00:40:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2025-03-08 00:40:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 658. [2025-03-08 00:40:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 438 states have (on average 1.1369863013698631) internal successors, (498), 439 states have internal predecessors, (498), 205 states have call successors, (205), 14 states have call predecessors, (205), 14 states have return successors, (205), 204 states have call predecessors, (205), 205 states have call successors, (205) [2025-03-08 00:40:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 908 transitions. [2025-03-08 00:40:53,861 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 908 transitions. Word has length 54 [2025-03-08 00:40:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:53,861 INFO L471 AbstractCegarLoop]: Abstraction has 658 states and 908 transitions. [2025-03-08 00:40:53,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:40:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 908 transitions. [2025-03-08 00:40:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 00:40:53,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:53,862 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:53,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:54,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:54,064 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:54,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1117268408, now seen corresponding path program 18 times [2025-03-08 00:40:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822623609] [2025-03-08 00:40:54,064 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:54,070 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 55 statements into 9 equivalence classes. [2025-03-08 00:40:54,083 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:40:54,084 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 00:40:54,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:54,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822623609] [2025-03-08 00:40:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822623609] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129996106] [2025-03-08 00:40:54,275 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:40:54,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:54,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:54,278 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 00:40:54,342 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 55 statements into 9 equivalence classes. [2025-03-08 00:40:55,473 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:40:55,474 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 00:40:55,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:55,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:40:55,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:55,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129996106] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:55,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:55,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2025-03-08 00:40:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206871862] [2025-03-08 00:40:55,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:55,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 00:40:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:55,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 00:40:55,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:40:55,727 INFO L87 Difference]: Start difference. First operand 658 states and 908 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:56,946 INFO L93 Difference]: Finished difference Result 1749 states and 2402 transitions. [2025-03-08 00:40:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-08 00:40:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2025-03-08 00:40:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:56,952 INFO L225 Difference]: With dead ends: 1749 [2025-03-08 00:40:56,952 INFO L226 Difference]: Without dead ends: 1225 [2025-03-08 00:40:56,954 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=798, Invalid=2624, Unknown=0, NotChecked=0, Total=3422 [2025-03-08 00:40:56,955 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1301 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:56,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 455 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:40:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2025-03-08 00:40:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 817. [2025-03-08 00:40:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 540 states have (on average 1.137037037037037) internal successors, (614), 541 states have internal predecessors, (614), 261 states have call successors, (261), 15 states have call predecessors, (261), 15 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) [2025-03-08 00:40:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1136 transitions. [2025-03-08 00:40:57,114 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1136 transitions. Word has length 55 [2025-03-08 00:40:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:57,114 INFO L471 AbstractCegarLoop]: Abstraction has 817 states and 1136 transitions. [2025-03-08 00:40:57,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1136 transitions. [2025-03-08 00:40:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 00:40:57,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:57,115 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:57,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 00:40:57,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:57,316 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:57,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 502756011, now seen corresponding path program 19 times [2025-03-08 00:40:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328808604] [2025-03-08 00:40:57,316 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:57,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 00:40:57,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:40:57,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:57,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:57,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328808604] [2025-03-08 00:40:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328808604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656073677] [2025-03-08 00:40:57,546 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:40:57,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:57,548 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:57,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 00:40:57,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 00:40:57,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:40:57,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:57,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:57,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:40:57,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:40:57,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:40:57,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656073677] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:57,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:57,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-08 00:40:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205715430] [2025-03-08 00:40:57,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:57,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:40:57,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:57,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:40:57,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:40:57,924 INFO L87 Difference]: Start difference. First operand 817 states and 1136 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:58,730 INFO L93 Difference]: Finished difference Result 893 states and 1212 transitions. [2025-03-08 00:40:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:40:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2025-03-08 00:40:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:58,734 INFO L225 Difference]: With dead ends: 893 [2025-03-08 00:40:58,734 INFO L226 Difference]: Without dead ends: 890 [2025-03-08 00:40:58,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:40:58,735 INFO L435 NwaCegarLoop]: 176 mSDtfsCounter, 148 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:58,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 968 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 00:40:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2025-03-08 00:40:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 818. [2025-03-08 00:40:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 541 states have (on average 1.1367837338262476) internal successors, (615), 542 states have internal predecessors, (615), 261 states have call successors, (261), 15 states have call predecessors, (261), 15 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) [2025-03-08 00:40:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1137 transitions. [2025-03-08 00:40:58,896 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1137 transitions. Word has length 55 [2025-03-08 00:40:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:58,897 INFO L471 AbstractCegarLoop]: Abstraction has 818 states and 1137 transitions. [2025-03-08 00:40:58,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:40:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1137 transitions. [2025-03-08 00:40:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-08 00:40:58,898 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:58,898 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:58,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:59,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:59,098 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:59,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1594401090, now seen corresponding path program 20 times [2025-03-08 00:40:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:59,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152441273] [2025-03-08 00:40:59,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:59,105 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-08 00:40:59,130 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 00:40:59,130 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:59,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:40:59,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012712882] [2025-03-08 00:40:59,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:59,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:59,134 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:40:59,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 00:40:59,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-08 00:40:59,444 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 00:40:59,444 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:59,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:59,447 WARN L254 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 135 conjuncts are in the unsatisfiable core [2025-03-08 00:40:59,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:59,484 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 11 treesize of output 7 [2025-03-08 00:40:59,488 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 11 treesize of output 7 [2025-03-08 00:40:59,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:59,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:40:59,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:59,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:40:59,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:59,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:40:59,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:59,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:40:59,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:59,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:40:59,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:40:59,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:40:59,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-03-08 00:40:59,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:40:59,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-03-08 00:41:02,614 INFO L349 Elim1Store]: treesize reduction 512, result has 25.7 percent of original size [2025-03-08 00:41:02,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 28 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 135 treesize of output 239 [2025-03-08 00:41:02,919 INFO L349 Elim1Store]: treesize reduction 480, result has 26.9 percent of original size [2025-03-08 00:41:02,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 28 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 135 treesize of output 237 [2025-03-08 00:41:11,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:11,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 432 treesize of output 282 [2025-03-08 00:41:11,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:11,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 717 treesize of output 471 [2025-03-08 00:41:14,051 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-03-08 00:41:16,893 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-03-08 00:41:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:41:16,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:19,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152441273] [2025-03-08 00:41:19,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:41:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012712882] [2025-03-08 00:41:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012712882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:41:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2025-03-08 00:41:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708632502] [2025-03-08 00:41:19,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:19,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-08 00:41:19,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:19,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-08 00:41:19,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2720, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 00:41:19,828 INFO L87 Difference]: Start difference. First operand 818 states and 1137 transitions. Second operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:41:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:22,478 INFO L93 Difference]: Finished difference Result 844 states and 1169 transitions. [2025-03-08 00:41:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-08 00:41:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.15625) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2025-03-08 00:41:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:22,482 INFO L225 Difference]: With dead ends: 844 [2025-03-08 00:41:22,482 INFO L226 Difference]: Without dead ends: 841 [2025-03-08 00:41:22,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=442, Invalid=3340, Unknown=0, NotChecked=0, Total=3782 [2025-03-08 00:41:22,483 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:22,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 332 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-08 00:41:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2025-03-08 00:41:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 824. [2025-03-08 00:41:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 547 states have (on average 1.1371115173674589) internal successors, (622), 547 states have internal predecessors, (622), 261 states have call successors, (261), 15 states have call predecessors, (261), 15 states have return successors, (261), 261 states have call predecessors, (261), 261 states have call successors, (261) [2025-03-08 00:41:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1144 transitions. [2025-03-08 00:41:22,641 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1144 transitions. Word has length 56 [2025-03-08 00:41:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:22,641 INFO L471 AbstractCegarLoop]: Abstraction has 824 states and 1144 transitions. [2025-03-08 00:41:22,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.15625) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:41:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1144 transitions. [2025-03-08 00:41:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 00:41:22,642 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:22,642 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:22,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 00:41:22,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-08 00:41:22,843 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:22,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2113205515, now seen corresponding path program 21 times [2025-03-08 00:41:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076670507] [2025-03-08 00:41:22,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:22,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:22,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 9 equivalence classes. [2025-03-08 00:41:22,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:41:22,884 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 00:41:22,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:41:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076670507] [2025-03-08 00:41:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076670507] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730363876] [2025-03-08 00:41:23,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:23,096 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:23,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 00:41:23,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 57 statements into 9 equivalence classes. [2025-03-08 00:41:23,291 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:41:23,292 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 00:41:23,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:23,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 00:41:23,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 61 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:41:23,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:41:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730363876] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:23,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-03-08 00:41:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3586515] [2025-03-08 00:41:23,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:23,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 00:41:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:23,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 00:41:23,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:41:23,587 INFO L87 Difference]: Start difference. First operand 824 states and 1144 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:41:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:25,065 INFO L93 Difference]: Finished difference Result 2312 states and 3177 transitions. [2025-03-08 00:41:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-08 00:41:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 57 [2025-03-08 00:41:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:25,071 INFO L225 Difference]: With dead ends: 2312 [2025-03-08 00:41:25,072 INFO L226 Difference]: Without dead ends: 1625 [2025-03-08 00:41:25,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 17 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1113, Invalid=3999, Unknown=0, NotChecked=0, Total=5112 [2025-03-08 00:41:25,075 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 1931 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 1574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1574 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:25,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1967 Valid, 494 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1574 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:41:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2025-03-08 00:41:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1022. [2025-03-08 00:41:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 675 states have (on average 1.1377777777777778) internal successors, (768), 675 states have internal predecessors, (768), 329 states have call successors, (329), 17 states have call predecessors, (329), 17 states have return successors, (329), 329 states have call predecessors, (329), 329 states have call successors, (329) [2025-03-08 00:41:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1426 transitions. [2025-03-08 00:41:25,295 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1426 transitions. Word has length 57 [2025-03-08 00:41:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:25,295 INFO L471 AbstractCegarLoop]: Abstraction has 1022 states and 1426 transitions. [2025-03-08 00:41:25,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 00:41:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1426 transitions. [2025-03-08 00:41:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 00:41:25,297 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:25,297 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:25,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 00:41:25,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 00:41:25,498 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:25,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1144768511, now seen corresponding path program 22 times [2025-03-08 00:41:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:25,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874732145] [2025-03-08 00:41:25,498 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:25,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:25,505 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 58 statements into 2 equivalence classes. [2025-03-08 00:41:25,547 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:41:25,547 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:25,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:41:25,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596573240] [2025-03-08 00:41:25,550 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:25,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:25,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:25,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 00:41:25,634 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 58 statements into 2 equivalence classes. [2025-03-08 00:41:25,885 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:41:25,885 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:25,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:25,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 132 conjuncts are in the unsatisfiable core [2025-03-08 00:41:25,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:25,919 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 11 treesize of output 7 [2025-03-08 00:41:25,925 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 11 treesize of output 7 [2025-03-08 00:41:25,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:41:25,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 00:41:25,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:25,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:41:25,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:25,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:41:26,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:41:26,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:41:26,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:41:26,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:41:26,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:41:26,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-03-08 00:41:26,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:41:26,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-03-08 00:41:26,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-03-08 00:41:26,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-03-08 00:41:26,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2025-03-08 00:41:26,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:41:26,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2025-03-08 00:41:28,818 INFO L349 Elim1Store]: treesize reduction 396, result has 33.4 percent of original size [2025-03-08 00:41:28,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 264 [2025-03-08 00:41:29,132 INFO L349 Elim1Store]: treesize reduction 360, result has 35.6 percent of original size [2025-03-08 00:41:29,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 262