./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s22if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s22if.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 0a4adccbfdb287a751e5c33c3e59569f71741de562bf1a42797adb485c4a44d2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:58:44,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:58:44,581 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:58:44,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:58:44,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:58:44,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:58:44,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:58:44,604 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:58:44,604 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:58:44,604 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:58:44,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:58:44,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:58:44,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:58:44,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:58:44,604 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:58:44,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:58:44,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:58:44,606 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:58:44,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:58:44,606 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:58:44,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:58:44,607 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 -> 0a4adccbfdb287a751e5c33c3e59569f71741de562bf1a42797adb485c4a44d2 [2025-03-16 13:58:44,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:58:44,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:58:44,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:58:44,855 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:58:44,855 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:58:44,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s22if.c [2025-03-16 13:58:45,986 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7c2f07c/9a61c5ac522844ca84595fa585962b44/FLAG895417cd7 [2025-03-16 13:58:46,190 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:58:46,192 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.c [2025-03-16 13:58:46,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7c2f07c/9a61c5ac522844ca84595fa585962b44/FLAG895417cd7 [2025-03-16 13:58:46,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7c2f07c/9a61c5ac522844ca84595fa585962b44 [2025-03-16 13:58:46,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:58:46,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:58:46,219 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:58:46,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:58:46,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:58:46,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762cd30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46, skipping insertion in model container [2025-03-16 13:58:46,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,235 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:58:46,330 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-fpi/s22if.c[588,601] [2025-03-16 13:58:46,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:58:46,357 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:58:46,365 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-fpi/s22if.c[588,601] [2025-03-16 13:58:46,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:58:46,385 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:58:46,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46 WrapperNode [2025-03-16 13:58:46,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:58:46,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:58:46,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:58:46,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:58:46,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,417 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2025-03-16 13:58:46,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:58:46,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:58:46,420 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:58:46,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:58:46,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,438 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 9, 6]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2025-03-16 13:58:46,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,446 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:58:46,452 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:58:46,452 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:58:46,452 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:58:46,453 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (1/1) ... [2025-03-16 13:58:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:58:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:46,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:58:46,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:58:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:58:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:58:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:58:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:58:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:58:46,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:58:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:58:46,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 13:58:46,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:58:46,553 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:58:46,554 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:58:46,673 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#sum~0#1.base, main_~#sum~0#1.offset);havoc main_~#sum~0#1.base, main_~#sum~0#1.offset; [2025-03-16 13:58:46,678 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:58:46,679 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:58:46,686 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:58:46,687 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:58:46,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:58:46 BoogieIcfgContainer [2025-03-16 13:58:46,688 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:58:46,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:58:46,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:58:46,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:58:46,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:58:46" (1/3) ... [2025-03-16 13:58:46,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7a9c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:58:46, skipping insertion in model container [2025-03-16 13:58:46,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:58:46" (2/3) ... [2025-03-16 13:58:46,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7a9c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:58:46, skipping insertion in model container [2025-03-16 13:58:46,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:58:46" (3/3) ... [2025-03-16 13:58:46,697 INFO L128 eAbstractionObserver]: Analyzing ICFG s22if.c [2025-03-16 13:58:46,708 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:58:46,710 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG s22if.c that has 1 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:58:46,752 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:58:46,762 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;@40cbf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:58:46,763 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:58:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:58:46,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:46,771 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:46,771 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:46,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1702049747, now seen corresponding path program 1 times [2025-03-16 13:58:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:46,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140828216] [2025-03-16 13:58:46,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:46,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:58:46,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:58:46,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:46,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:46,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140828216] [2025-03-16 13:58:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140828216] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:58:46,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:58:46,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:58:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137336319] [2025-03-16 13:58:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:58:46,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:58:46,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:46,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:58:46,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:58:46,932 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:46,941 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2025-03-16 13:58:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:58:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:58:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:46,947 INFO L225 Difference]: With dead ends: 33 [2025-03-16 13:58:46,947 INFO L226 Difference]: Without dead ends: 14 [2025-03-16 13:58:46,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:58:46,952 INFO L435 NwaCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:46,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:58:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-16 13:58:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-16 13:58:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-03-16 13:58:46,978 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2025-03-16 13:58:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:46,979 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-03-16 13:58:46,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-03-16 13:58:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:58:46,980 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:46,980 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:46,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:58:46,981 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:46,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash -814546066, now seen corresponding path program 1 times [2025-03-16 13:58:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:46,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678216073] [2025-03-16 13:58:46,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:46,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:46,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:58:47,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:58:47,016 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:47,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678216073] [2025-03-16 13:58:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678216073] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:58:47,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:58:47,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:58:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288973893] [2025-03-16 13:58:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:58:47,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:58:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:47,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:58:47,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:58:47,149 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:47,212 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2025-03-16 13:58:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:58:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:58:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:47,213 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:58:47,213 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 13:58:47,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:58:47,214 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:47,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 13:58:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2025-03-16 13:58:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-16 13:58:47,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2025-03-16 13:58:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:47,218 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-16 13:58:47,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-16 13:58:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:58:47,219 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:47,219 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:47,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:58:47,220 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:47,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2089170647, now seen corresponding path program 1 times [2025-03-16 13:58:47,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:47,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569618569] [2025-03-16 13:58:47,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:47,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:47,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:47,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:47,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:47,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:47,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569618569] [2025-03-16 13:58:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569618569] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890538161] [2025-03-16 13:58:47,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:47,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:47,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:47,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:47,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:58:47,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:47,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:47,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:47,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:47,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 13:58:47,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:47,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:58:47,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-16 13:58:47,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:58:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:48,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:48,103 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 14 treesize of output 12 [2025-03-16 13:58:48,109 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 18 treesize of output 16 [2025-03-16 13:58:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890538161] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:48,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-16 13:58:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143139845] [2025-03-16 13:58:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:48,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:58:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:48,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:58:48,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:58:48,129 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:49,134 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2025-03-16 13:58:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:58:49,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:58:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:49,136 INFO L225 Difference]: With dead ends: 128 [2025-03-16 13:58:49,136 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 13:58:49,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=762, Invalid=3528, Unknown=0, NotChecked=0, Total=4290 [2025-03-16 13:58:49,139 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 270 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:49,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 54 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:58:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 13:58:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2025-03-16 13:58:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2025-03-16 13:58:49,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 16 [2025-03-16 13:58:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:49,150 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2025-03-16 13:58:49,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2025-03-16 13:58:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:58:49,151 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:49,151 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:49,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:58:49,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:49,352 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:49,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2090094168, now seen corresponding path program 1 times [2025-03-16 13:58:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236799012] [2025-03-16 13:58:49,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:49,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:49,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:49,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:49,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236799012] [2025-03-16 13:58:49,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236799012] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119130692] [2025-03-16 13:58:49,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:49,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:49,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:49,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:58:49,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:49,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:49,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:49,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:49,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:58:49,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:49,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:58:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:49,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:49,595 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 14 treesize of output 12 [2025-03-16 13:58:49,597 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 14 treesize of output 12 [2025-03-16 13:58:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119130692] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:49,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:49,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:58:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680016569] [2025-03-16 13:58:49,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:49,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:58:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:49,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:58:49,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:58:49,607 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:49,665 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2025-03-16 13:58:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:58:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:58:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:49,666 INFO L225 Difference]: With dead ends: 71 [2025-03-16 13:58:49,666 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 13:58:49,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:58:49,667 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:49,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:58:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 13:58:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-16 13:58:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-16 13:58:49,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2025-03-16 13:58:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:49,671 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-16 13:58:49,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-16 13:58:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:58:49,671 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:49,671 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:49,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:58:49,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:58:49,872 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:49,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -397418665, now seen corresponding path program 1 times [2025-03-16 13:58:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081669905] [2025-03-16 13:58:49,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:49,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:49,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:49,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:49,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081669905] [2025-03-16 13:58:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081669905] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087313602] [2025-03-16 13:58:50,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:50,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:50,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:58:50,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:58:50,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:58:50,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:50,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:50,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 13:58:50,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:50,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:58:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:50,217 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 27 treesize of output 23 [2025-03-16 13:58:50,235 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:58:50,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2025-03-16 13:58:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087313602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:50,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:50,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-03-16 13:58:50,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5912809] [2025-03-16 13:58:50,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:50,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:58:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:50,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:58:50,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:58:50,246 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:50,347 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2025-03-16 13:58:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:58:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:58:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:50,348 INFO L225 Difference]: With dead ends: 72 [2025-03-16 13:58:50,348 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 13:58:50,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:58:50,349 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:50,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 13:58:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2025-03-16 13:58:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2025-03-16 13:58:50,354 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 16 [2025-03-16 13:58:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:50,355 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2025-03-16 13:58:50,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2025-03-16 13:58:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:58:50,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:50,355 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:50,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:58:50,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:50,556 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:50,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash -643528403, now seen corresponding path program 1 times [2025-03-16 13:58:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270885476] [2025-03-16 13:58:50,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:50,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:58:50,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:58:50,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:50,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270885476] [2025-03-16 13:58:50,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270885476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423242989] [2025-03-16 13:58:50,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:50,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:50,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:50,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:50,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:58:50,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:58:50,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:58:50,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:50,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:50,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:58:50,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:50,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423242989] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:50,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:50,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:58:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068866326] [2025-03-16 13:58:50,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:50,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:58:50,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:50,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:58:50,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:58:50,758 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:50,870 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2025-03-16 13:58:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:58:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 13:58:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:50,871 INFO L225 Difference]: With dead ends: 72 [2025-03-16 13:58:50,871 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 13:58:50,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:58:50,872 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:50,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 26 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 13:58:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2025-03-16 13:58:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2025-03-16 13:58:50,878 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 17 [2025-03-16 13:58:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:50,878 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2025-03-16 13:58:50,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2025-03-16 13:58:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:58:50,879 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:50,879 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:50,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:58:51,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:51,083 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:51,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash 100913453, now seen corresponding path program 2 times [2025-03-16 13:58:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:51,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435704404] [2025-03-16 13:58:51,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:58:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:51,092 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:58:51,098 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:58:51,098 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:58:51,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:51,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435704404] [2025-03-16 13:58:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435704404] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771278239] [2025-03-16 13:58:51,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:58:51,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:51,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:51,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:51,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:58:51,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:58:51,203 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:58:51,203 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:58:51,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:51,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:58:51,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:51,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:58:51,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771278239] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:51,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:58:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898646855] [2025-03-16 13:58:51,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:51,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:58:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:51,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:58:51,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:58:51,283 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:51,352 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2025-03-16 13:58:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:58:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 13:58:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:51,353 INFO L225 Difference]: With dead ends: 65 [2025-03-16 13:58:51,353 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:58:51,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:58:51,354 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:51,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:58:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2025-03-16 13:58:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-16 13:58:51,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2025-03-16 13:58:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:51,359 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-16 13:58:51,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-16 13:58:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:58:51,360 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:51,360 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:51,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:58:51,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:51,561 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:51,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1738020749, now seen corresponding path program 1 times [2025-03-16 13:58:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:51,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128133640] [2025-03-16 13:58:51,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:51,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:51,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:51,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:51,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:51,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:51,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128133640] [2025-03-16 13:58:51,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128133640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:51,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646467419] [2025-03-16 13:58:51,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:51,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:51,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:51,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:51,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:58:51,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:51,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:51,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:51,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:51,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:58:51,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:51,989 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 [2025-03-16 13:58:52,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:58:52,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:58:52,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:58:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:52,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:52,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-03-16 13:58:52,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-03-16 13:58:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:52,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646467419] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:52,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 32 [2025-03-16 13:58:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121084064] [2025-03-16 13:58:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:52,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 13:58:52,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:52,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 13:58:52,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:58:52,385 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:55,077 INFO L93 Difference]: Finished difference Result 229 states and 325 transitions. [2025-03-16 13:58:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2025-03-16 13:58:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:58:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:55,078 INFO L225 Difference]: With dead ends: 229 [2025-03-16 13:58:55,078 INFO L226 Difference]: Without dead ends: 218 [2025-03-16 13:58:55,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6346 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2172, Invalid=16188, Unknown=0, NotChecked=0, Total=18360 [2025-03-16 13:58:55,083 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 379 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:55,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 101 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:58:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-16 13:58:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 88. [2025-03-16 13:58:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 87 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2025-03-16 13:58:55,096 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 23 [2025-03-16 13:58:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:55,096 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2025-03-16 13:58:55,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2025-03-16 13:58:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:58:55,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:55,097 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:55,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:58:55,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:55,301 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:55,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1738944270, now seen corresponding path program 1 times [2025-03-16 13:58:55,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:55,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439571662] [2025-03-16 13:58:55,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:55,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:55,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:55,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:55,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:55,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439571662] [2025-03-16 13:58:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439571662] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791914097] [2025-03-16 13:58:55,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:55,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:58:55,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:55,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:55,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:55,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:55,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:58:55,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:55,635 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 [2025-03-16 13:58:55,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:58:55,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:58:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:55,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:55,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:58:55,736 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 16 treesize of output 12 [2025-03-16 13:58:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791914097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:55,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2025-03-16 13:58:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923130860] [2025-03-16 13:58:55,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:55,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:58:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:55,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:58:55,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:58:55,754 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:55,901 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2025-03-16 13:58:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:58:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:58:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:55,903 INFO L225 Difference]: With dead ends: 127 [2025-03-16 13:58:55,903 INFO L226 Difference]: Without dead ends: 67 [2025-03-16 13:58:55,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:58:55,904 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:55,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-16 13:58:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2025-03-16 13:58:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2025-03-16 13:58:55,924 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 23 [2025-03-16 13:58:55,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:55,924 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2025-03-16 13:58:55,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2025-03-16 13:58:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:58:55,924 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:55,924 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:55,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:58:56,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:56,125 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:56,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1609861551, now seen corresponding path program 1 times [2025-03-16 13:58:56,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:56,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350816615] [2025-03-16 13:58:56,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:56,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:56,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:56,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:56,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:56,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350816615] [2025-03-16 13:58:56,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350816615] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:56,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126458469] [2025-03-16 13:58:56,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:58:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:56,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:58:56,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:58:56,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:58:56,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:58:56,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:58:56,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:56,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:58:56,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:56,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:58:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:58:56,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:56,588 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 29 treesize of output 25 [2025-03-16 13:58:56,591 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:58:56,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2025-03-16 13:58:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:58:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126458469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:56,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:56,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 24 [2025-03-16 13:58:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695463351] [2025-03-16 13:58:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:56,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:58:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:56,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:58:56,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:58:56,616 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:56,898 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2025-03-16 13:58:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:58:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:58:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:56,899 INFO L225 Difference]: With dead ends: 88 [2025-03-16 13:58:56,899 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 13:58:56,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:58:56,899 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:56,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 60 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:58:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 13:58:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2025-03-16 13:58:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2025-03-16 13:58:56,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 23 [2025-03-16 13:58:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:56,907 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2025-03-16 13:58:56,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2025-03-16 13:58:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:58:56,907 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:56,907 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:56,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:58:57,108 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,SelfDestructingSolverStorable9 [2025-03-16 13:58:57,108 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:57,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1935748873, now seen corresponding path program 3 times [2025-03-16 13:58:57,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:57,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037393560] [2025-03-16 13:58:57,109 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:58:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:57,115 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-16 13:58:57,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:58:57,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:58:57,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:57,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:57,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037393560] [2025-03-16 13:58:57,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037393560] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:57,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993979047] [2025-03-16 13:58:57,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:58:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:57,197 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) [2025-03-16 13:58:57,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:58:57,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-16 13:58:57,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:58:57,255 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:58:57,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:57,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:58:57,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:57,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:58:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993979047] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:57,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-16 13:58:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646955409] [2025-03-16 13:58:57,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:57,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:58:57,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:57,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:58:57,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:58:57,371 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:57,533 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2025-03-16 13:58:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:58:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-16 13:58:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:57,534 INFO L225 Difference]: With dead ends: 107 [2025-03-16 13:58:57,534 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 13:58:57,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:58:57,535 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:57,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 13:58:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2025-03-16 13:58:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2025-03-16 13:58:57,548 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 24 [2025-03-16 13:58:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:57,549 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2025-03-16 13:58:57,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2025-03-16 13:58:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:58:57,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:57,549 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:57,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 13:58:57,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:57,750 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:57,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash 156166101, now seen corresponding path program 4 times [2025-03-16 13:58:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274526194] [2025-03-16 13:58:57,751 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:58:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:57,760 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:58:57,766 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 13:58:57,768 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:58:57,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:58:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274526194] [2025-03-16 13:58:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274526194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453008715] [2025-03-16 13:58:57,813 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:58:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:57,815 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) [2025-03-16 13:58:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:58:57,860 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:58:57,869 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 13:58:57,869 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:58:57,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:57,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:58:57,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:58:57,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:58:57,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453008715] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:57,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:57,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-03-16 13:58:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861815387] [2025-03-16 13:58:57,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:57,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:58:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:57,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:58:57,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:58:57,955 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:58:58,044 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2025-03-16 13:58:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:58:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 13:58:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:58:58,045 INFO L225 Difference]: With dead ends: 95 [2025-03-16 13:58:58,045 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 13:58:58,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:58:58,046 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:58:58,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:58:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 13:58:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2025-03-16 13:58:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2025-03-16 13:58:58,052 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2025-03-16 13:58:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:58:58,052 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2025-03-16 13:58:58,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:58:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2025-03-16 13:58:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 13:58:58,052 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:58:58,052 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:58:58,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:58:58,252 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,SelfDestructingSolverStorable11 [2025-03-16 13:58:58,253 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:58:58,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:58:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1087963607, now seen corresponding path program 2 times [2025-03-16 13:58:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:58:58,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593532873] [2025-03-16 13:58:58,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:58:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:58:58,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:58:58,265 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:58:58,265 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:58:58,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:58:58,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:58:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593532873] [2025-03-16 13:58:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593532873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:58:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575529336] [2025-03-16 13:58:58,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:58:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:58:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:58:58,617 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) [2025-03-16 13:58:58,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:58:58,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:58:58,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:58:58,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:58:58,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:58:58,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-16 13:58:58,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:58:58,733 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 [2025-03-16 13:58:58,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:58:58,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:58:58,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:58:58,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:58:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:58:58,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:58:59,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-03-16 13:58:59,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-03-16 13:58:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:58:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575529336] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:58:59,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:58:59,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 17] total 40 [2025-03-16 13:58:59,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935482468] [2025-03-16 13:58:59,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:58:59,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:58:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:58:59,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:58:59,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:58:59,215 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:02,111 INFO L93 Difference]: Finished difference Result 186 states and 254 transitions. [2025-03-16 13:59:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-03-16 13:59:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-16 13:59:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:02,112 INFO L225 Difference]: With dead ends: 186 [2025-03-16 13:59:02,112 INFO L226 Difference]: Without dead ends: 167 [2025-03-16 13:59:02,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1095, Invalid=13667, Unknown=0, NotChecked=0, Total=14762 [2025-03-16 13:59:02,115 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 251 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:02,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 178 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 13:59:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2025-03-16 13:59:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 83. [2025-03-16 13:59:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 82 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2025-03-16 13:59:02,131 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 30 [2025-03-16 13:59:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:02,132 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2025-03-16 13:59:02,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2025-03-16 13:59:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 13:59:02,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:02,133 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:02,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:02,338 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,SelfDestructingSolverStorable12 [2025-03-16 13:59:02,338 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:02,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -418664681, now seen corresponding path program 2 times [2025-03-16 13:59:02,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:02,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704095219] [2025-03-16 13:59:02,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:02,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:02,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:02,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:02,363 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:02,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:02,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:02,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704095219] [2025-03-16 13:59:02,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704095219] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:02,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555542516] [2025-03-16 13:59:02,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:02,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:02,624 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) [2025-03-16 13:59:02,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:59:02,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:02,696 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:02,696 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:02,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:02,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-16 13:59:02,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:02,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:02,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:02,893 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 29 treesize of output 25 [2025-03-16 13:59:02,897 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:59:02,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2025-03-16 13:59:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:59:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555542516] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:02,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 28 [2025-03-16 13:59:02,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895094095] [2025-03-16 13:59:02,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:02,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 13:59:02,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:02,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 13:59:02,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-03-16 13:59:02,937 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:03,305 INFO L93 Difference]: Finished difference Result 197 states and 259 transitions. [2025-03-16 13:59:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 13:59:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-16 13:59:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:03,306 INFO L225 Difference]: With dead ends: 197 [2025-03-16 13:59:03,306 INFO L226 Difference]: Without dead ends: 155 [2025-03-16 13:59:03,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 13:59:03,307 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 158 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:03,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 57 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:59:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-16 13:59:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2025-03-16 13:59:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 115 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2025-03-16 13:59:03,324 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 30 [2025-03-16 13:59:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:03,324 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2025-03-16 13:59:03,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2025-03-16 13:59:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:59:03,325 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:03,325 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:03,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:03,529 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,SelfDestructingSolverStorable13 [2025-03-16 13:59:03,529 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:03,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1182026579, now seen corresponding path program 5 times [2025-03-16 13:59:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583031890] [2025-03-16 13:59:03,530 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:03,540 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-16 13:59:03,549 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:59:03,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:59:03,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:03,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:03,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583031890] [2025-03-16 13:59:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583031890] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252835580] [2025-03-16 13:59:03,618 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:03,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:03,620 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) [2025-03-16 13:59:03,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:59:03,671 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-16 13:59:03,708 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:59:03,708 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:59:03,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:03,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:59:03,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:03,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252835580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:03,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2025-03-16 13:59:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471377196] [2025-03-16 13:59:03,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:03,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 13:59:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:03,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 13:59:03,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:59:03,823 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:04,013 INFO L93 Difference]: Finished difference Result 177 states and 221 transitions. [2025-03-16 13:59:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:59:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 13:59:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:04,014 INFO L225 Difference]: With dead ends: 177 [2025-03-16 13:59:04,015 INFO L226 Difference]: Without dead ends: 164 [2025-03-16 13:59:04,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:59:04,016 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:04,016 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 23 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-03-16 13:59:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 120. [2025-03-16 13:59:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2521008403361344) internal successors, (149), 119 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 149 transitions. [2025-03-16 13:59:04,035 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 149 transitions. Word has length 31 [2025-03-16 13:59:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:04,035 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 149 transitions. [2025-03-16 13:59:04,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 149 transitions. [2025-03-16 13:59:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:59:04,037 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:04,037 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:04,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:04,237 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,SelfDestructingSolverStorable14 [2025-03-16 13:59:04,238 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:04,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1478956691, now seen corresponding path program 6 times [2025-03-16 13:59:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:04,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729876977] [2025-03-16 13:59:04,239 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:59:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:04,244 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:59:04,262 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:59:04,263 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:59:04,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:04,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729876977] [2025-03-16 13:59:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729876977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726178547] [2025-03-16 13:59:04,335 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:59:04,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:04,337 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) [2025-03-16 13:59:04,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:59:04,385 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:59:04,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:59:04,411 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:59:04,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:04,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:59:04,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:04,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726178547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:04,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-16 13:59:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967840402] [2025-03-16 13:59:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:04,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:59:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:04,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:59:04,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:59:04,555 INFO L87 Difference]: Start difference. First operand 120 states and 149 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:04,639 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2025-03-16 13:59:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:59:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 13:59:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:04,640 INFO L225 Difference]: With dead ends: 147 [2025-03-16 13:59:04,640 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:59:04,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:04,640 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:04,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 28 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:59:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2025-03-16 13:59:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2025-03-16 13:59:04,649 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 33 [2025-03-16 13:59:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:04,649 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2025-03-16 13:59:04,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2025-03-16 13:59:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:59:04,650 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:04,650 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:04,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 13:59:04,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:04,850 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:04,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1314561267, now seen corresponding path program 3 times [2025-03-16 13:59:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451793318] [2025-03-16 13:59:04,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:04,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:04,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:04,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:59:04,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:05,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:05,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451793318] [2025-03-16 13:59:05,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451793318] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:05,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772483069] [2025-03-16 13:59:05,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:05,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:05,231 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) [2025-03-16 13:59:05,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:59:05,279 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:05,315 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:05,315 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:59:05,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:05,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:59:05,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:05,323 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 [2025-03-16 13:59:05,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:05,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:05,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:05,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:05,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772483069] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:06,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2025-03-16 13:59:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357584014] [2025-03-16 13:59:06,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:06,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-16 13:59:06,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:06,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-16 13:59:06,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 13:59:06,274 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:08,944 INFO L93 Difference]: Finished difference Result 176 states and 230 transitions. [2025-03-16 13:59:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-03-16 13:59:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:59:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:08,945 INFO L225 Difference]: With dead ends: 176 [2025-03-16 13:59:08,945 INFO L226 Difference]: Without dead ends: 154 [2025-03-16 13:59:08,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=830, Invalid=10726, Unknown=0, NotChecked=0, Total=11556 [2025-03-16 13:59:08,948 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:08,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 123 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 13:59:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-16 13:59:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2025-03-16 13:59:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2025-03-16 13:59:08,967 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 37 [2025-03-16 13:59:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:08,967 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2025-03-16 13:59:08,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2025-03-16 13:59:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:59:08,968 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:08,968 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:08,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:09,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:59:09,169 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:09,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -316565393, now seen corresponding path program 3 times [2025-03-16 13:59:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217008857] [2025-03-16 13:59:09,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:09,175 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:09,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-03-16 13:59:09,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:09,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:59:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217008857] [2025-03-16 13:59:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217008857] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683920061] [2025-03-16 13:59:09,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:09,406 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) [2025-03-16 13:59:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:59:09,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:09,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-03-16 13:59:09,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:09,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 13:59:09,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:09,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-16 13:59:09,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:09,588 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 24 treesize of output 17 [2025-03-16 13:59:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:59:09,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:59:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683920061] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:09,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 25 [2025-03-16 13:59:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023552288] [2025-03-16 13:59:09,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:09,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:59:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:09,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:59:09,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:59:09,746 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:10,776 INFO L93 Difference]: Finished difference Result 261 states and 338 transitions. [2025-03-16 13:59:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-16 13:59:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:59:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:10,777 INFO L225 Difference]: With dead ends: 261 [2025-03-16 13:59:10,777 INFO L226 Difference]: Without dead ends: 220 [2025-03-16 13:59:10,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=3530, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 13:59:10,778 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 206 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:10,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 122 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-16 13:59:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 171. [2025-03-16 13:59:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3058823529411765) internal successors, (222), 170 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 222 transitions. [2025-03-16 13:59:10,807 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 222 transitions. Word has length 37 [2025-03-16 13:59:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:10,807 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 222 transitions. [2025-03-16 13:59:10,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 222 transitions. [2025-03-16 13:59:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:59:10,808 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:10,808 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:10,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:59:11,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:59:11,009 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:11,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1520938518, now seen corresponding path program 4 times [2025-03-16 13:59:11,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:11,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872091995] [2025-03-16 13:59:11,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:11,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:11,015 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-16 13:59:11,022 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 38 statements. [2025-03-16 13:59:11,022 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:11,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:59:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872091995] [2025-03-16 13:59:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872091995] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634271665] [2025-03-16 13:59:11,434 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:11,435 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) [2025-03-16 13:59:11,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:59:11,487 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-16 13:59:11,499 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 38 statements. [2025-03-16 13:59:11,499 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:11,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:11,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 13:59:11,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:11,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-16 13:59:11,556 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2025-03-16 13:59:11,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2025-03-16 13:59:11,646 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2025-03-16 13:59:11,646 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 4 case distinctions, treesize of input 50 treesize of output 58 [2025-03-16 13:59:11,773 INFO L349 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2025-03-16 13:59:11,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 80 [2025-03-16 13:59:11,940 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2025-03-16 13:59:11,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 35 [2025-03-16 13:59:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 13:59:12,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:59:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634271665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:12,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 18] total 45 [2025-03-16 13:59:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465983615] [2025-03-16 13:59:12,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:12,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-16 13:59:12,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:12,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-16 13:59:12,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 13:59:12,467 INFO L87 Difference]: Start difference. First operand 171 states and 222 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:16,349 INFO L93 Difference]: Finished difference Result 364 states and 483 transitions. [2025-03-16 13:59:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-03-16 13:59:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:59:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:16,351 INFO L225 Difference]: With dead ends: 364 [2025-03-16 13:59:16,351 INFO L226 Difference]: Without dead ends: 341 [2025-03-16 13:59:16,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1764, Invalid=9578, Unknown=0, NotChecked=0, Total=11342 [2025-03-16 13:59:16,352 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 234 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:16,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 118 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 13:59:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2025-03-16 13:59:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 254. [2025-03-16 13:59:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.3438735177865613) internal successors, (340), 253 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 340 transitions. [2025-03-16 13:59:16,399 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 340 transitions. Word has length 38 [2025-03-16 13:59:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:16,400 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 340 transitions. [2025-03-16 13:59:16,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 340 transitions. [2025-03-16 13:59:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:59:16,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:16,400 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:16,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 13:59:16,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:16,601 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:16,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1776956425, now seen corresponding path program 7 times [2025-03-16 13:59:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:16,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612275637] [2025-03-16 13:59:16,601 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:59:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:16,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:59:16,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:59:16,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:16,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612275637] [2025-03-16 13:59:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612275637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952891534] [2025-03-16 13:59:16,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:59:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:16,719 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) [2025-03-16 13:59:16,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:59:16,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:59:16,796 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:59:16,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:16,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:16,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:59:16,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:16,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:16,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952891534] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:16,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:16,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-16 13:59:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427363391] [2025-03-16 13:59:16,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:16,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 13:59:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:16,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 13:59:16,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:16,948 INFO L87 Difference]: Start difference. First operand 254 states and 340 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:17,196 INFO L93 Difference]: Finished difference Result 304 states and 401 transitions. [2025-03-16 13:59:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:59:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:59:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:17,197 INFO L225 Difference]: With dead ends: 304 [2025-03-16 13:59:17,197 INFO L226 Difference]: Without dead ends: 280 [2025-03-16 13:59:17,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:59:17,199 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:17,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 28 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2025-03-16 13:59:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 224. [2025-03-16 13:59:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.336322869955157) internal successors, (298), 223 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 298 transitions. [2025-03-16 13:59:17,255 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 298 transitions. Word has length 38 [2025-03-16 13:59:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:17,255 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 298 transitions. [2025-03-16 13:59:17,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 298 transitions. [2025-03-16 13:59:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:17,256 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:17,256 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:17,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:17,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:17,460 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:17,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -331499371, now seen corresponding path program 2 times [2025-03-16 13:59:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:17,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851158497] [2025-03-16 13:59:17,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:17,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:17,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:17,478 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:17,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-16 13:59:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851158497] [2025-03-16 13:59:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851158497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716881083] [2025-03-16 13:59:17,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:17,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:17,782 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) [2025-03-16 13:59:17,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:59:17,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:17,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:17,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:17,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:17,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:59:17,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:17,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:59:17,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:17,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:59:17,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:17,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:59:17,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:17,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:59:17,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:17,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2025-03-16 13:59:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:18,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:18,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-03-16 13:59:18,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-03-16 13:59:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716881083] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:18,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 25] total 44 [2025-03-16 13:59:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683995456] [2025-03-16 13:59:18,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:18,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 13:59:18,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:18,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 13:59:18,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1680, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:59:18,488 INFO L87 Difference]: Start difference. First operand 224 states and 298 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:19,506 INFO L93 Difference]: Finished difference Result 318 states and 420 transitions. [2025-03-16 13:59:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-16 13:59:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:19,507 INFO L225 Difference]: With dead ends: 318 [2025-03-16 13:59:19,507 INFO L226 Difference]: Without dead ends: 247 [2025-03-16 13:59:19,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 13:59:19,508 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 103 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:19,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 129 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:59:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-16 13:59:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 209. [2025-03-16 13:59:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.3125) internal successors, (273), 208 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 273 transitions. [2025-03-16 13:59:19,550 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 273 transitions. Word has length 44 [2025-03-16 13:59:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:19,550 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 273 transitions. [2025-03-16 13:59:19,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 273 transitions. [2025-03-16 13:59:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:19,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:19,551 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:19,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:19,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:19,751 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:19,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2076313430, now seen corresponding path program 8 times [2025-03-16 13:59:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:19,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113942541] [2025-03-16 13:59:19,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:19,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:19,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:19,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:19,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:20,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113942541] [2025-03-16 13:59:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113942541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159263091] [2025-03-16 13:59:20,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:20,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:20,298 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) [2025-03-16 13:59:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 13:59:20,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:20,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:20,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:20,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:20,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 13:59:20,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:20,386 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 [2025-03-16 13:59:20,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:20,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:20,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:20,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:20,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:20,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:21,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159263091] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:21,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:21,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 51 [2025-03-16 13:59:21,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744535827] [2025-03-16 13:59:21,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:21,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-16 13:59:21,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:21,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-16 13:59:21,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 13:59:21,464 INFO L87 Difference]: Start difference. First operand 209 states and 273 transitions. Second operand has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:24,516 INFO L93 Difference]: Finished difference Result 446 states and 592 transitions. [2025-03-16 13:59:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-16 13:59:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:24,519 INFO L225 Difference]: With dead ends: 446 [2025-03-16 13:59:24,519 INFO L226 Difference]: Without dead ends: 434 [2025-03-16 13:59:24,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=820, Invalid=11390, Unknown=0, NotChecked=0, Total=12210 [2025-03-16 13:59:24,521 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:24,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 112 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3511 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 13:59:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2025-03-16 13:59:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 350. [2025-03-16 13:59:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.329512893982808) internal successors, (464), 349 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 464 transitions. [2025-03-16 13:59:24,601 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 464 transitions. Word has length 44 [2025-03-16 13:59:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:24,601 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 464 transitions. [2025-03-16 13:59:24,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 464 transitions. [2025-03-16 13:59:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:24,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:24,602 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:24,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 13:59:24,803 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,SelfDestructingSolverStorable21 [2025-03-16 13:59:24,803 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:24,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -475843531, now seen corresponding path program 4 times [2025-03-16 13:59:24,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:24,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164686872] [2025-03-16 13:59:24,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:24,810 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:24,816 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:24,816 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:24,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:59:25,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164686872] [2025-03-16 13:59:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164686872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035006154] [2025-03-16 13:59:25,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:25,282 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) [2025-03-16 13:59:25,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 13:59:25,350 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:25,364 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:25,365 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:25,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:25,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 13:59:25,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:25,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:25,473 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2025-03-16 13:59:25,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-16 13:59:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:25,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:25,755 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 53 treesize of output 47 [2025-03-16 13:59:25,773 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2025-03-16 13:59:25,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 114 [2025-03-16 13:59:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035006154] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:25,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 15] total 41 [2025-03-16 13:59:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765520166] [2025-03-16 13:59:25,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:25,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 13:59:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:25,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 13:59:25,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:59:25,791 INFO L87 Difference]: Start difference. First operand 350 states and 464 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:26,479 INFO L93 Difference]: Finished difference Result 377 states and 498 transitions. [2025-03-16 13:59:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 13:59:26,480 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:26,481 INFO L225 Difference]: With dead ends: 377 [2025-03-16 13:59:26,481 INFO L226 Difference]: Without dead ends: 273 [2025-03-16 13:59:26,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=659, Invalid=3763, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:59:26,481 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:26,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 53 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-16 13:59:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 254. [2025-03-16 13:59:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2529644268774704) internal successors, (317), 253 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2025-03-16 13:59:26,538 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 44 [2025-03-16 13:59:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:26,538 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2025-03-16 13:59:26,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2025-03-16 13:59:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 13:59:26,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:26,539 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:26,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:26,740 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,SelfDestructingSolverStorable22 [2025-03-16 13:59:26,740 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:26,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1416630227, now seen corresponding path program 9 times [2025-03-16 13:59:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:26,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610045] [2025-03-16 13:59:26,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:26,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:59:26,761 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:59:26,762 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:59:26,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610045] [2025-03-16 13:59:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610045] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907558212] [2025-03-16 13:59:26,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:26,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:26,898 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) [2025-03-16 13:59:26,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 13:59:26,977 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:59:27,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:59:27,055 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:59:27,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:27,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:59:27,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:27,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:27,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907558212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:27,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:27,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-16 13:59:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870860058] [2025-03-16 13:59:27,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:27,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:59:27,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:27,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:59:27,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:59:27,237 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:27,650 INFO L93 Difference]: Finished difference Result 306 states and 377 transitions. [2025-03-16 13:59:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:59:27,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-16 13:59:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:27,652 INFO L225 Difference]: With dead ends: 306 [2025-03-16 13:59:27,652 INFO L226 Difference]: Without dead ends: 285 [2025-03-16 13:59:27,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:59:27,653 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:27,653 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 39 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2025-03-16 13:59:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 214. [2025-03-16 13:59:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.2535211267605635) internal successors, (267), 213 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 267 transitions. [2025-03-16 13:59:27,698 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 267 transitions. Word has length 45 [2025-03-16 13:59:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:27,699 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 267 transitions. [2025-03-16 13:59:27,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 267 transitions. [2025-03-16 13:59:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:59:27,699 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:27,699 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:27,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-16 13:59:27,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:27,900 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:27,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -547266131, now seen corresponding path program 10 times [2025-03-16 13:59:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:27,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215505210] [2025-03-16 13:59:27,900 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:27,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:27,907 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:59:27,910 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 44 of 47 statements. [2025-03-16 13:59:27,910 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:27,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:28,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215505210] [2025-03-16 13:59:28,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215505210] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132798240] [2025-03-16 13:59:28,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:28,011 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:28,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 13:59:28,095 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:59:28,112 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 44 of 47 statements. [2025-03-16 13:59:28,112 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:28,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:28,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:59:28,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:28,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132798240] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:28,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:28,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2025-03-16 13:59:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541249608] [2025-03-16 13:59:28,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:28,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 13:59:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:28,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 13:59:28,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:28,306 INFO L87 Difference]: Start difference. First operand 214 states and 267 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:28,523 INFO L93 Difference]: Finished difference Result 282 states and 347 transitions. [2025-03-16 13:59:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:59:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:59:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:28,524 INFO L225 Difference]: With dead ends: 282 [2025-03-16 13:59:28,524 INFO L226 Difference]: Without dead ends: 100 [2025-03-16 13:59:28,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:59:28,525 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:28,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 33 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-16 13:59:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2025-03-16 13:59:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 92 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2025-03-16 13:59:28,547 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 47 [2025-03-16 13:59:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:28,547 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2025-03-16 13:59:28,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2025-03-16 13:59:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:59:28,547 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:28,547 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:28,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 13:59:28,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:28,748 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:28,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -919457874, now seen corresponding path program 11 times [2025-03-16 13:59:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443390706] [2025-03-16 13:59:28,748 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:28,756 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:28,764 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:28,765 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:28,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 13:59:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443390706] [2025-03-16 13:59:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443390706] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090325953] [2025-03-16 13:59:29,451 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:29,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:29,453 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:29,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 13:59:29,523 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:29,908 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:29,908 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:29,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:29,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-16 13:59:29,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:29,920 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 [2025-03-16 13:59:29,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:30,808 INFO L349 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2025-03-16 13:59:30,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 19 [2025-03-16 13:59:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 13:59:30,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:32,271 INFO L349 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2025-03-16 13:59:32,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 25 [2025-03-16 13:59:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 13:59:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090325953] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:32,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 73 [2025-03-16 13:59:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11801955] [2025-03-16 13:59:32,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:32,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-16 13:59:32,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:32,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-16 13:59:32,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=4546, Unknown=0, NotChecked=0, Total=5256 [2025-03-16 13:59:32,658 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:38,938 INFO L93 Difference]: Finished difference Result 270 states and 337 transitions. [2025-03-16 13:59:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-03-16 13:59:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:59:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:38,940 INFO L225 Difference]: With dead ends: 270 [2025-03-16 13:59:38,940 INFO L226 Difference]: Without dead ends: 267 [2025-03-16 13:59:38,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5373 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1768, Invalid=12994, Unknown=0, NotChecked=0, Total=14762 [2025-03-16 13:59:38,941 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 178 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:38,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 82 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2174 Invalid, 3 Unknown, 0 Unchecked, 3.2s Time] [2025-03-16 13:59:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-16 13:59:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 120. [2025-03-16 13:59:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 119 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2025-03-16 13:59:38,981 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 51 [2025-03-16 13:59:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:38,981 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2025-03-16 13:59:38,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2025-03-16 13:59:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:59:38,982 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:38,982 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:38,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-16 13:59:39,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-16 13:59:39,182 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:39,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 823352461, now seen corresponding path program 5 times [2025-03-16 13:59:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:39,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382519485] [2025-03-16 13:59:39,183 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:39,190 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:39,203 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:39,206 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:39,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 13:59:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382519485] [2025-03-16 13:59:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382519485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697282712] [2025-03-16 13:59:39,431 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:39,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:39,433 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:39,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 13:59:39,505 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:41,070 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:41,070 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:41,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:41,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 13:59:41,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:41,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:41,131 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2025-03-16 13:59:41,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-16 13:59:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 13:59:41,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:41,687 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_430| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_430| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_430| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 2))) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 3))) is different from false [2025-03-16 13:59:41,721 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 53 treesize of output 47 [2025-03-16 13:59:41,729 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2025-03-16 13:59:41,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 114 [2025-03-16 13:59:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 72 refuted. 0 times theorem prover too weak. 23 trivial. 5 not checked. [2025-03-16 13:59:41,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697282712] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:41,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 26 [2025-03-16 13:59:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542853934] [2025-03-16 13:59:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:41,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 13:59:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:41,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 13:59:41,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=526, Unknown=1, NotChecked=46, Total=650 [2025-03-16 13:59:41,753 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:42,113 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2025-03-16 13:59:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:59:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:59:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:42,114 INFO L225 Difference]: With dead ends: 138 [2025-03-16 13:59:42,114 INFO L226 Difference]: Without dead ends: 125 [2025-03-16 13:59:42,114 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=617, Unknown=1, NotChecked=50, Total=756 [2025-03-16 13:59:42,115 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:42,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 843 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2025-03-16 13:59:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-16 13:59:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2025-03-16 13:59:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 122 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2025-03-16 13:59:42,152 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 51 [2025-03-16 13:59:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:42,152 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2025-03-16 13:59:42,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2025-03-16 13:59:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 13:59:42,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:42,152 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:42,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 13:59:42,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-16 13:59:42,353 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:42,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -786807594, now seen corresponding path program 3 times [2025-03-16 13:59:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501665451] [2025-03-16 13:59:42,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:42,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 8 equivalence classes. [2025-03-16 13:59:42,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 51 of 54 statements. [2025-03-16 13:59:42,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:59:42,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501665451] [2025-03-16 13:59:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501665451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383693680] [2025-03-16 13:59:43,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:43,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:43,026 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:43,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 13:59:43,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 8 equivalence classes. [2025-03-16 13:59:43,183 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 51 of 54 statements. [2025-03-16 13:59:43,183 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:59:43,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:43,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:59:43,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:43,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:43,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:43,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 33 treesize of output 26 [2025-03-16 13:59:43,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:43,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 33 treesize of output 26 [2025-03-16 13:59:43,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:43,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 33 treesize of output 26 [2025-03-16 13:59:43,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:43,439 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 17 treesize of output 15 [2025-03-16 13:59:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 40 proven. 85 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:43,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-16 13:59:43,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383693680] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:43,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:43,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 17] total 55 [2025-03-16 13:59:43,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475281410] [2025-03-16 13:59:43,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:43,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 13:59:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:43,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 13:59:43,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2646, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:59:43,976 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 55 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:50,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:59:59,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:00:04,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]