./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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-cav19/array_init_nondet_vars.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:50:44,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:50:44,144 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:50:44,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:50:44,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:50:44,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:50:44,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:50:44,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:50:44,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:50:44,166 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:50:44,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:50:44,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:50:44,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:50:44,167 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:50:44,168 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:50:44,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:50:44,168 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2025-03-16 13:50:44,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:50:44,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:50:44,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:50:44,395 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:50:44,395 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:50:44,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-16 13:50:45,564 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611dd1681/50817bbbcd8a40e58bd1a8314f564bf2/FLAG7e54eff1b [2025-03-16 13:50:45,793 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:50:45,795 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-16 13:50:45,805 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611dd1681/50817bbbcd8a40e58bd1a8314f564bf2/FLAG7e54eff1b [2025-03-16 13:50:45,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611dd1681/50817bbbcd8a40e58bd1a8314f564bf2 [2025-03-16 13:50:45,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:50:45,841 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:50:45,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:50:45,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:50:45,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:50:45,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:50:45" (1/1) ... [2025-03-16 13:50:45,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38356cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:45, skipping insertion in model container [2025-03-16 13:50:45,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:50:45" (1/1) ... [2025-03-16 13:50:45,860 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:50:45,955 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2025-03-16 13:50:45,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:50:45,975 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:50:45,983 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2025-03-16 13:50:45,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:50:46,001 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:50:46,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46 WrapperNode [2025-03-16 13:50:46,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:50:46,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:50:46,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:50:46,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:50:46,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,026 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2025-03-16 13:50:46,027 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:50:46,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:50:46,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:50:46,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:50:46,033 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,049 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:50:46,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,051 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,053 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:50:46,060 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:50:46,060 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:50:46,060 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:50:46,061 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (1/1) ... [2025-03-16 13:50:46,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:50:46,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:46,089 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 13:50:46,094 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 13:50:46,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:50:46,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 13:50:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 13:50:46,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:50:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:50:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:50:46,163 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:50:46,164 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:50:46,271 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:50:46,278 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 13:50:46,278 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:50:46,283 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:50:46,284 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:50:46,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:50:46 BoogieIcfgContainer [2025-03-16 13:50:46,284 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:50:46,285 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:50:46,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:50:46,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:50:46,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:50:45" (1/3) ... [2025-03-16 13:50:46,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e6cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:50:46, skipping insertion in model container [2025-03-16 13:50:46,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:50:46" (2/3) ... [2025-03-16 13:50:46,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e6cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:50:46, skipping insertion in model container [2025-03-16 13:50:46,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:50:46" (3/3) ... [2025-03-16 13:50:46,290 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2025-03-16 13:50:46,299 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:50:46,300 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_nondet_vars.c that has 2 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 13:50:46,347 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:50:46,354 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;@5e9b9168, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:50:46,354 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:50:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:50:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:50:46,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:46,363 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:46,363 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:46,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1336816207, now seen corresponding path program 1 times [2025-03-16 13:50:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937386937] [2025-03-16 13:50:46,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:46,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:46,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:50:46,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:50:46,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:46,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:50:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937386937] [2025-03-16 13:50:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937386937] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245855382] [2025-03-16 13:50:46,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:46,490 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 13:50:46,491 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 13:50:46,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:50:46,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:50:46,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:46,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:46,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 13:50:46,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:50:46,574 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:50:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245855382] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:50:46,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:50:46,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 13:50:46,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130727697] [2025-03-16 13:50:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:50:46,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:50:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:46,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:50:46,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:50:46,596 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:50:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:46,607 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2025-03-16 13:50:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:50:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-16 13:50:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:46,614 INFO L225 Difference]: With dead ends: 38 [2025-03-16 13:50:46,615 INFO L226 Difference]: Without dead ends: 17 [2025-03-16 13:50:46,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 13:50:46,621 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 13:50:46,623 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 13:50:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-16 13:50:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-16 13:50:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:50:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-03-16 13:50:46,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2025-03-16 13:50:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:46,643 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-03-16 13:50:46,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:50:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-03-16 13:50:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:50:46,645 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:46,645 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:46,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:50:46,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 13:50:46,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:46,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -99564497, now seen corresponding path program 1 times [2025-03-16 13:50:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:46,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221605550] [2025-03-16 13:50:46,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:46,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:50:46,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:50:46,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:46,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:50:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221605550] [2025-03-16 13:50:47,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221605550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:50:47,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:50:47,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:50:47,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108823975] [2025-03-16 13:50:47,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:50:47,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:50:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:47,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:50:47,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:50:47,008 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:50:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:47,040 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2025-03-16 13:50:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:50:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2025-03-16 13:50:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:47,041 INFO L225 Difference]: With dead ends: 31 [2025-03-16 13:50:47,041 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 13:50:47,041 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 13:50:47,042 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:47,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:50:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 13:50:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2025-03-16 13:50:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:50:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-16 13:50:47,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 17 [2025-03-16 13:50:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:47,048 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-16 13:50:47,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:50:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-16 13:50:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:50:47,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:47,049 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:47,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:50:47,049 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:47,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -842399892, now seen corresponding path program 1 times [2025-03-16 13:50:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544965382] [2025-03-16 13:50:47,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:47,057 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:50:47,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:50:47,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:47,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:50:47,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544965382] [2025-03-16 13:50:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544965382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742522276] [2025-03-16 13:50:47,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:47,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:47,440 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 13:50:47,441 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 13:50:47,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:50:47,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:50:47,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:47,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:47,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:50:47,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:47,660 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 13:50:47,729 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 13:50:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:50:47,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:47,806 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 13:50:47,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:50:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:50:47,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742522276] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:47,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:47,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2025-03-16 13:50:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645471821] [2025-03-16 13:50:47,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:47,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:50:47,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:47,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:50:47,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:50:47,924 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 13:50:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:48,098 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2025-03-16 13:50:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:50:48,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2025-03-16 13:50:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:48,099 INFO L225 Difference]: With dead ends: 38 [2025-03-16 13:50:48,100 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:50:48,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:50:48,101 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:48,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:50:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:50:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2025-03-16 13:50:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 13:50:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-03-16 13:50:48,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 24 [2025-03-16 13:50:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:48,109 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-03-16 13:50:48,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 13:50:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-03-16 13:50:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:50:48,110 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:48,111 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:48,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:50:48,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 13:50:48,315 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:48,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash -440399233, now seen corresponding path program 1 times [2025-03-16 13:50:48,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:48,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863995241] [2025-03-16 13:50:48,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:48,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:48,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 13:50:48,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:50:48,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:48,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863995241] [2025-03-16 13:50:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863995241] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979983377] [2025-03-16 13:50:48,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:50:48,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:48,389 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 13:50:48,391 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 13:50:48,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 13:50:48,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:50:48,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:50:48,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:48,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:50:48,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:48,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979983377] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:48,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:48,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:50:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668895997] [2025-03-16 13:50:48,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:48,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:50:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:48,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:50:48,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:50:48,503 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 13:50:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:48,542 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2025-03-16 13:50:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:50:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2025-03-16 13:50:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:48,543 INFO L225 Difference]: With dead ends: 42 [2025-03-16 13:50:48,543 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 13:50:48,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:50:48,543 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:48,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:50:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 13:50:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2025-03-16 13:50:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 13:50:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-03-16 13:50:48,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 27 [2025-03-16 13:50:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:48,547 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-03-16 13:50:48,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 13:50:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-03-16 13:50:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:50:48,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:48,549 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:48,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:50:48,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:48,756 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:48,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1376774769, now seen corresponding path program 2 times [2025-03-16 13:50:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021672107] [2025-03-16 13:50:48,757 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:50:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:48,767 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:50:48,786 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:50:48,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:50:48,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:49,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021672107] [2025-03-16 13:50:49,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021672107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630299372] [2025-03-16 13:50:49,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:50:49,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:49,066 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 13:50:49,068 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 13:50:49,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:50:49,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:50:49,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:50:49,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:49,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 13:50:49,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:49,234 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 13:50:49,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:50:49,356 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 13:50:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:50:49,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:49,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:50:49,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-16 13:50:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630299372] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:49,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:49,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2025-03-16 13:50:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941139303] [2025-03-16 13:50:49,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:49,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:50:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:49,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:50:49,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:50:49,541 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-16 13:50:53,767 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 13:50:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:53,787 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2025-03-16 13:50:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:50:53,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2025-03-16 13:50:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:53,788 INFO L225 Difference]: With dead ends: 58 [2025-03-16 13:50:53,788 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 13:50:53,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2025-03-16 13:50:53,789 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:53,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 161 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2025-03-16 13:50:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 13:50:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2025-03-16 13:50:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:50:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2025-03-16 13:50:53,798 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 31 [2025-03-16 13:50:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:53,799 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2025-03-16 13:50:53,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-16 13:50:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2025-03-16 13:50:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:50:53,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:53,800 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:53,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:50:54,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:54,001 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:54,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1441406332, now seen corresponding path program 2 times [2025-03-16 13:50:54,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:54,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909027455] [2025-03-16 13:50:54,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:50:54,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:54,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:50:54,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:50:54,026 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:50:54,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909027455] [2025-03-16 13:50:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909027455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774423880] [2025-03-16 13:50:54,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:50:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:54,303 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 13:50:54,305 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 13:50:54,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:50:54,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:50:54,347 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:50:54,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:54,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 13:50:54,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:54,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:50:54,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:50:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:54,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:54,585 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 13:50:54,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:50:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:50:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774423880] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:54,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2025-03-16 13:50:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288901230] [2025-03-16 13:50:54,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:54,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:50:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:54,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:50:54,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:50:54,701 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-03-16 13:50:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:54,948 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2025-03-16 13:50:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:50:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 34 [2025-03-16 13:50:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:54,950 INFO L225 Difference]: With dead ends: 62 [2025-03-16 13:50:54,950 INFO L226 Difference]: Without dead ends: 60 [2025-03-16 13:50:54,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:50:54,950 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:54,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 200 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:50:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-16 13:50:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2025-03-16 13:50:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:50:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2025-03-16 13:50:54,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 34 [2025-03-16 13:50:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:54,965 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2025-03-16 13:50:54,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-03-16 13:50:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2025-03-16 13:50:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:50:54,966 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:54,966 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:54,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:50:55,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:55,166 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:55,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -146115985, now seen corresponding path program 3 times [2025-03-16 13:50:55,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:55,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332028906] [2025-03-16 13:50:55,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:50:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:55,172 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-16 13:50:55,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 37 statements. [2025-03-16 13:50:55,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:50:55,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 13:50:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332028906] [2025-03-16 13:50:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332028906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423775231] [2025-03-16 13:50:55,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:50:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:55,241 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 13:50:55,243 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 13:50:55,268 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-16 13:50:55,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 37 statements. [2025-03-16 13:50:55,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:50:55,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:55,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:50:55,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 13:50:55,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 13:50:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423775231] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:55,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-16 13:50:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758709053] [2025-03-16 13:50:55,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:55,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:50:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:55,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:50:55,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:50:55,369 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 13:50:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:50:55,421 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2025-03-16 13:50:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:50:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2025-03-16 13:50:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:50:55,422 INFO L225 Difference]: With dead ends: 61 [2025-03-16 13:50:55,422 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 13:50:55,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:50:55,423 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:50:55,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 77 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:50:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 13:50:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2025-03-16 13:50:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:50:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-03-16 13:50:55,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2025-03-16 13:50:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:50:55,428 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-03-16 13:50:55,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 13:50:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-03-16 13:50:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 13:50:55,429 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:50:55,429 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:50:55,434 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 13:50:55,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:55,633 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:50:55,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:50:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1053744161, now seen corresponding path program 4 times [2025-03-16 13:50:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:50:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314018687] [2025-03-16 13:50:55,633 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:50:55,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:50:55,638 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-16 13:50:55,648 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:50:55,648 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:50:55,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:50:55,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:50:55,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314018687] [2025-03-16 13:50:55,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314018687] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:50:55,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353693523] [2025-03-16 13:50:55,922 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:50:55,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:50:55,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:50:55,923 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 13:50:55,925 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 13:50:55,958 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-16 13:50:55,972 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:50:55,973 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:50:55,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:50:55,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 13:50:55,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:50:56,134 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 13:50:56,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:50:56,304 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 13:50:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:50:56,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:50:56,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:50:56,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-16 13:50:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:50:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353693523] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:50:56,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:50:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2025-03-16 13:50:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979338120] [2025-03-16 13:50:56,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:50:56,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:50:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:50:56,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:50:56,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:50:56,497 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2025-03-16 13:51:00,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:51:04,797 WARN L539 Checker$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 13:51:08,825 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 13:51:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:08,825 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2025-03-16 13:51:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:51:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 41 [2025-03-16 13:51:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:08,832 INFO L225 Difference]: With dead ends: 81 [2025-03-16 13:51:08,832 INFO L226 Difference]: Without dead ends: 79 [2025-03-16 13:51:08,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:51:08,834 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:08,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 215 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 307 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2025-03-16 13:51:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-16 13:51:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2025-03-16 13:51:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 13:51:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-03-16 13:51:08,846 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 41 [2025-03-16 13:51:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:08,846 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-03-16 13:51:08,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2025-03-16 13:51:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-03-16 13:51:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:51:08,847 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:08,847 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:08,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:09,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:09,047 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:09,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -175461076, now seen corresponding path program 5 times [2025-03-16 13:51:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875490540] [2025-03-16 13:51:09,048 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:09,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:09,066 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 5 equivalence classes. [2025-03-16 13:51:09,081 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:51:09,081 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:51:09,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:51:09,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875490540] [2025-03-16 13:51:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875490540] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197413475] [2025-03-16 13:51:09,378 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:09,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:09,381 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 13:51:09,383 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 13:51:09,415 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 5 equivalence classes. [2025-03-16 13:51:09,430 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:51:09,430 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:51:09,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:09,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 13:51:09,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:09,589 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 13:51:09,676 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 13:51:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:51:09,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:09,771 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 13:51:09,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:51:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:51:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197413475] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:09,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:09,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2025-03-16 13:51:09,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264769718] [2025-03-16 13:51:09,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:09,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 13:51:09,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:09,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 13:51:09,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 13:51:09,965 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-16 13:51:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:10,246 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2025-03-16 13:51:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:51:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 44 [2025-03-16 13:51:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:10,247 INFO L225 Difference]: With dead ends: 79 [2025-03-16 13:51:10,247 INFO L226 Difference]: Without dead ends: 77 [2025-03-16 13:51:10,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:51:10,248 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:10,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 290 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:51:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-16 13:51:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2025-03-16 13:51:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 13:51:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2025-03-16 13:51:10,259 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 44 [2025-03-16 13:51:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:10,259 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2025-03-16 13:51:10,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 28 states have internal predecessors, (59), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-16 13:51:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2025-03-16 13:51:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 13:51:10,262 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:10,262 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:10,268 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 13:51:10,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 13:51:10,467 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:10,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash -831160593, now seen corresponding path program 3 times [2025-03-16 13:51:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:10,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859751571] [2025-03-16 13:51:10,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:10,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:10,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:51:10,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:51:10,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:51:10,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 13:51:10,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859751571] [2025-03-16 13:51:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859751571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946913185] [2025-03-16 13:51:10,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:10,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:10,826 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 13:51:10,828 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 13:51:10,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:51:10,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:51:10,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:51:10,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:10,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 13:51:10,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:10,979 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 13:51:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:11,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:51:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:11,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2025-03-16 13:51:11,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:11,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:51:11,254 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 13:51:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:51:11,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:15,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946913185] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:15,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:51:15,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2025-03-16 13:51:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713573922] [2025-03-16 13:51:15,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:15,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:51:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:15,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:51:15,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2025-03-16 13:51:15,377 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-16 13:51:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:15,610 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2025-03-16 13:51:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:51:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 45 [2025-03-16 13:51:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:15,613 INFO L225 Difference]: With dead ends: 75 [2025-03-16 13:51:15,613 INFO L226 Difference]: Without dead ends: 73 [2025-03-16 13:51:15,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=191, Invalid=864, Unknown=1, NotChecked=0, Total=1056 [2025-03-16 13:51:15,614 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:15,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-03-16 13:51:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2025-03-16 13:51:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:51:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2025-03-16 13:51:15,621 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 45 [2025-03-16 13:51:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:15,622 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2025-03-16 13:51:15,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-16 13:51:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2025-03-16 13:51:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:51:15,622 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:15,622 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:15,628 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 13:51:15,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:51:15,827 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:15,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash -184843073, now seen corresponding path program 6 times [2025-03-16 13:51:15,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:15,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541585263] [2025-03-16 13:51:15,828 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:15,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:15,833 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 5 equivalence classes. [2025-03-16 13:51:15,840 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:51:15,840 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:51:15,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:51:15,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541585263] [2025-03-16 13:51:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541585263] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273513895] [2025-03-16 13:51:15,922 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:15,924 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 13:51:15,926 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 13:51:15,956 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 5 equivalence classes. [2025-03-16 13:51:15,975 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:51:15,975 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:51:15,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:15,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:51:15,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:51:16,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:51:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273513895] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:16,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-03-16 13:51:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819640665] [2025-03-16 13:51:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:16,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:51:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:16,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:51:16,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:51:16,115 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-16 13:51:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:16,194 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2025-03-16 13:51:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:51:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2025-03-16 13:51:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:16,195 INFO L225 Difference]: With dead ends: 80 [2025-03-16 13:51:16,195 INFO L226 Difference]: Without dead ends: 65 [2025-03-16 13:51:16,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:51:16,195 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:16,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 105 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-16 13:51:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2025-03-16 13:51:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:51:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2025-03-16 13:51:16,217 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 47 [2025-03-16 13:51:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:16,217 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2025-03-16 13:51:16,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-16 13:51:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2025-03-16 13:51:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:51:16,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:16,218 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:16,226 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 13:51:16,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 13:51:16,418 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:16,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 615732175, now seen corresponding path program 7 times [2025-03-16 13:51:16,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:16,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43253313] [2025-03-16 13:51:16,419 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:16,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:16,424 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 13:51:16,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:51:16,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:16,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 13:51:16,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43253313] [2025-03-16 13:51:16,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43253313] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703349228] [2025-03-16 13:51:16,754 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:16,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:16,756 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 13:51:16,757 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 13:51:16,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 13:51:16,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:51:16,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:16,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:16,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 13:51:16,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:16,966 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 13:51:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:17,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:51:17,099 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 13:51:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:51:17,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:17,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703349228] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:17,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:51:17,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2025-03-16 13:51:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60468457] [2025-03-16 13:51:17,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:17,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:51:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:17,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:51:17,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:51:17,218 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-16 13:51:21,258 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 13:51:25,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:51:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:25,486 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2025-03-16 13:51:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:51:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 51 [2025-03-16 13:51:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:25,487 INFO L225 Difference]: With dead ends: 64 [2025-03-16 13:51:25,487 INFO L226 Difference]: Without dead ends: 62 [2025-03-16 13:51:25,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 13:51:25,488 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:25,488 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 200 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 367 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2025-03-16 13:51:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-16 13:51:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2025-03-16 13:51:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:51:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2025-03-16 13:51:25,497 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 51 [2025-03-16 13:51:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:25,497 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2025-03-16 13:51:25,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-16 13:51:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2025-03-16 13:51:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 13:51:25,497 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:25,497 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:25,505 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 13:51:25,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:51:25,698 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:25,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash -527222980, now seen corresponding path program 8 times [2025-03-16 13:51:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235165333] [2025-03-16 13:51:25,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:25,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-16 13:51:25,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:51:25,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:25,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 13:51:26,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:26,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235165333] [2025-03-16 13:51:26,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235165333] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:26,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119619440] [2025-03-16 13:51:26,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:26,007 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 13:51:26,008 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 13:51:26,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-16 13:51:26,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:51:26,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:26,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:26,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 13:51:26,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:26,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:26,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 13:51:26,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:26,534 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 13:51:26,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:51:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 13:51:26,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119619440] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:26,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:26,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2025-03-16 13:51:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411228106] [2025-03-16 13:51:26,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:26,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-16 13:51:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:26,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-16 13:51:26,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:51:26,752 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 34 states have internal predecessors, (73), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2025-03-16 13:51:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:27,461 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2025-03-16 13:51:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 13:51:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 34 states have internal predecessors, (73), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 54 [2025-03-16 13:51:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:27,462 INFO L225 Difference]: With dead ends: 95 [2025-03-16 13:51:27,462 INFO L226 Difference]: Without dead ends: 93 [2025-03-16 13:51:27,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=516, Invalid=2790, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 13:51:27,463 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:27,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 279 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:51:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-16 13:51:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2025-03-16 13:51:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:51:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2025-03-16 13:51:27,471 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 54 [2025-03-16 13:51:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:27,472 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2025-03-16 13:51:27,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 34 states have internal predecessors, (73), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2025-03-16 13:51:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2025-03-16 13:51:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 13:51:27,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:27,472 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:27,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 13:51:27,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:51:27,676 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:27,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1653232959, now seen corresponding path program 9 times [2025-03-16 13:51:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:27,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992667955] [2025-03-16 13:51:27,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:27,681 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 7 equivalence classes. [2025-03-16 13:51:27,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:51:27,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:51:27,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:51:28,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:28,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992667955] [2025-03-16 13:51:28,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992667955] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374678669] [2025-03-16 13:51:28,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:28,025 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 13:51:28,026 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 13:51:28,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 7 equivalence classes. [2025-03-16 13:51:28,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:51:28,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:51:28,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:28,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 13:51:28,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:28,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:28,247 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:28,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:28,305 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:28,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:28,386 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:28,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:28,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 13:51:28,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:28,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-16 13:51:28,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-16 13:51:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-16 13:51:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374678669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:28,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 25 [2025-03-16 13:51:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020324072] [2025-03-16 13:51:28,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:28,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:51:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:28,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:51:28,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:51:28,658 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2025-03-16 13:51:32,706 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 13:51:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:32,970 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2025-03-16 13:51:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:51:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 55 [2025-03-16 13:51:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:32,971 INFO L225 Difference]: With dead ends: 85 [2025-03-16 13:51:32,971 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 13:51:32,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:51:32,972 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:32,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 248 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 428 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2025-03-16 13:51:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 13:51:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2025-03-16 13:51:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 13:51:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2025-03-16 13:51:32,982 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 55 [2025-03-16 13:51:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:32,982 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2025-03-16 13:51:32,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2025-03-16 13:51:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2025-03-16 13:51:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 13:51:32,984 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:32,984 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:32,990 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 13:51:33,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:51:33,187 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:33,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:33,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1463954975, now seen corresponding path program 10 times [2025-03-16 13:51:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:33,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985959554] [2025-03-16 13:51:33,187 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:51:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:33,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-16 13:51:33,207 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 13:51:33,208 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:51:33,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:51:33,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:33,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985959554] [2025-03-16 13:51:33,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985959554] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:33,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022098799] [2025-03-16 13:51:33,531 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:51:33,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:33,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:33,533 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 13:51:33,534 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 13:51:33,570 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-16 13:51:33,590 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 13:51:33,590 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:51:33,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:33,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-16 13:51:33,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:33,819 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 13:51:33,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:51:34,059 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 13:51:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 65 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 13:51:34,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:34,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:51:34,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-16 13:51:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:51:34,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022098799] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:34,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:34,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17] total 33 [2025-03-16 13:51:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072577811] [2025-03-16 13:51:34,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:34,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:51:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:34,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:51:34,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:51:34,303 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-16 13:51:38,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:51:42,400 WARN L539 Checker$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 13:51:46,432 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 13:51:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:46,765 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2025-03-16 13:51:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:51:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 61 [2025-03-16 13:51:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:46,766 INFO L225 Difference]: With dead ends: 124 [2025-03-16 13:51:46,766 INFO L226 Difference]: Without dead ends: 122 [2025-03-16 13:51:46,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 13:51:46,767 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:46,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 352 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 728 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2025-03-16 13:51:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-03-16 13:51:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2025-03-16 13:51:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:51:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2025-03-16 13:51:46,777 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 61 [2025-03-16 13:51:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:46,777 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2025-03-16 13:51:46,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-16 13:51:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2025-03-16 13:51:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 13:51:46,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:46,778 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:46,785 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 13:51:46,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:46,979 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:46,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1585609452, now seen corresponding path program 11 times [2025-03-16 13:51:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072245030] [2025-03-16 13:51:46,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:46,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:46,985 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 64 statements into 7 equivalence classes. [2025-03-16 13:51:46,994 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 13:51:46,994 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:51:46,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 13:51:47,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072245030] [2025-03-16 13:51:47,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072245030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535250728] [2025-03-16 13:51:47,311 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:47,313 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 13:51:47,315 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 13:51:47,360 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 64 statements into 7 equivalence classes. [2025-03-16 13:51:47,383 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 13:51:47,383 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:51:47,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:47,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 13:51:47,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:47,645 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 13:51:47,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:51:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:51:47,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:47,984 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 13:51:47,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:51:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:51:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535250728] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:48,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 37 [2025-03-16 13:51:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738310832] [2025-03-16 13:51:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:48,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 13:51:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:48,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 13:51:48,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 13:51:48,099 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 33 states have internal predecessors, (68), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-16 13:51:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:48,615 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2025-03-16 13:51:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:51:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 33 states have internal predecessors, (68), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 64 [2025-03-16 13:51:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:48,616 INFO L225 Difference]: With dead ends: 137 [2025-03-16 13:51:48,616 INFO L226 Difference]: Without dead ends: 135 [2025-03-16 13:51:48,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1819, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:51:48,618 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:48,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 491 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:51:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-03-16 13:51:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 80. [2025-03-16 13:51:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:51:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2025-03-16 13:51:48,633 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2025-03-16 13:51:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:48,633 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2025-03-16 13:51:48,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 33 states have internal predecessors, (68), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-16 13:51:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2025-03-16 13:51:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 13:51:48,634 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:48,634 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:48,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 13:51:48,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 13:51:48,835 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:48,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash 841735935, now seen corresponding path program 12 times [2025-03-16 13:51:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921891043] [2025-03-16 13:51:48,835 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:48,841 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 67 statements into 7 equivalence classes. [2025-03-16 13:51:48,856 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:51:48,856 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:51:48,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 13:51:48,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921891043] [2025-03-16 13:51:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921891043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766117593] [2025-03-16 13:51:48,972 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:48,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:48,974 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 13:51:48,976 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 13:51:49,016 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 67 statements into 7 equivalence classes. [2025-03-16 13:51:49,046 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:51:49,046 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:51:49,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:49,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:51:49,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 13:51:49,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 13:51:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766117593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:49,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-16 13:51:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137672392] [2025-03-16 13:51:49,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:49,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:51:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:49,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:51:49,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:51:49,281 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-16 13:51:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:49,421 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2025-03-16 13:51:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:51:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2025-03-16 13:51:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:49,422 INFO L225 Difference]: With dead ends: 136 [2025-03-16 13:51:49,422 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 13:51:49,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:51:49,423 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:49,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 110 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 13:51:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2025-03-16 13:51:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:51:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2025-03-16 13:51:49,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 67 [2025-03-16 13:51:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:49,431 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2025-03-16 13:51:49,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-16 13:51:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2025-03-16 13:51:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 13:51:49,431 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:49,431 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:49,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:49,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:51:49,632 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:49,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1639943665, now seen corresponding path program 13 times [2025-03-16 13:51:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410667872] [2025-03-16 13:51:49,632 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:49,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 13:51:49,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 13:51:49,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:49,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-16 13:51:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410667872] [2025-03-16 13:51:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410667872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981582628] [2025-03-16 13:51:49,992 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:49,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:49,994 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 13:51:49,995 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 13:51:50,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 13:51:50,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 13:51:50,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:50,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:50,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:51:50,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:50,339 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 13:51:50,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:51:50,591 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 13:51:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 31 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 13:51:50,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:50,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981582628] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:50,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:51:50,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2025-03-16 13:51:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715435072] [2025-03-16 13:51:50,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:50,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 13:51:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:50,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 13:51:50,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:51:50,754 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 32 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2025-03-16 13:51:54,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:51:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:55,341 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2025-03-16 13:51:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 13:51:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 32 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 71 [2025-03-16 13:51:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:55,343 INFO L225 Difference]: With dead ends: 133 [2025-03-16 13:51:55,343 INFO L226 Difference]: Without dead ends: 131 [2025-03-16 13:51:55,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 13:51:55,344 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 243 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:55,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 423 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 800 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2025-03-16 13:51:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-16 13:51:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2025-03-16 13:51:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:51:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2025-03-16 13:51:55,354 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 71 [2025-03-16 13:51:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:55,355 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2025-03-16 13:51:55,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 32 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2025-03-16 13:51:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2025-03-16 13:51:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-16 13:51:55,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:55,355 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:55,361 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 13:51:55,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:51:55,557 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:55,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash -307859204, now seen corresponding path program 14 times [2025-03-16 13:51:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:55,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189203490] [2025-03-16 13:51:55,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:55,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:55,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-16 13:51:55,571 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 13:51:55,571 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:55,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 39 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-16 13:51:55,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189203490] [2025-03-16 13:51:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189203490] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311702189] [2025-03-16 13:51:55,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:55,968 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 13:51:55,969 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 13:51:56,014 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-16 13:51:56,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 13:51:56,032 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:56,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:56,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 13:51:56,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:56,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:56,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-16 13:51:56,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:56,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:51:56,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:51:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-16 13:51:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311702189] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:56,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2025-03-16 13:51:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747369814] [2025-03-16 13:51:56,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:56,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-16 13:51:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:56,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-16 13:51:56,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 13:51:56,944 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 45 states have internal predecessors, (103), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-16 13:51:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:57,636 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2025-03-16 13:51:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:51:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 45 states have internal predecessors, (103), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 74 [2025-03-16 13:51:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:57,637 INFO L225 Difference]: With dead ends: 130 [2025-03-16 13:51:57,637 INFO L226 Difference]: Without dead ends: 101 [2025-03-16 13:51:57,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=634, Invalid=3398, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 13:51:57,639 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 175 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:57,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 464 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:51:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-16 13:51:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2025-03-16 13:51:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:51:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2025-03-16 13:51:57,648 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 74 [2025-03-16 13:51:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:57,648 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2025-03-16 13:51:57,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 45 states have internal predecessors, (103), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-16 13:51:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2025-03-16 13:51:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 13:51:57,649 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:57,649 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:57,655 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 13:51:57,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:57,850 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:57,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -764088449, now seen corresponding path program 15 times [2025-03-16 13:51:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321774433] [2025-03-16 13:51:57,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:57,857 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 9 equivalence classes. [2025-03-16 13:51:57,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 13:51:57,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 13:51:57,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 109 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:51:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321774433] [2025-03-16 13:51:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321774433] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519629177] [2025-03-16 13:51:58,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:58,225 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 13:51:58,225 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 13:51:58,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 9 equivalence classes. [2025-03-16 13:51:58,337 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 13:51:58,337 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 13:51:58,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:58,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 13:51:58,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:58,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:58,534 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:58,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:58,593 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:58,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:58,678 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:58,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:58,755 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 19 treesize of output 7 [2025-03-16 13:51:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 78 proven. 103 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 13:51:58,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:58,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-16 13:51:58,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-16 13:51:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 109 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:51:59,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519629177] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:59,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 33 [2025-03-16 13:51:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261068895] [2025-03-16 13:51:59,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:59,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:51:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:59,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:51:59,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:51:59,019 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 29 states have internal predecessors, (69), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 15 states have call predecessors, (17), 13 states have call successors, (17) [2025-03-16 13:52:03,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 13:52:07,134 WARN L539 Checker$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 13:52:11,162 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 13:52:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:11,520 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2025-03-16 13:52:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:52:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 29 states have internal predecessors, (69), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 15 states have call predecessors, (17), 13 states have call successors, (17) Word has length 75 [2025-03-16 13:52:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:11,521 INFO L225 Difference]: With dead ends: 101 [2025-03-16 13:52:11,521 INFO L226 Difference]: Without dead ends: 99 [2025-03-16 13:52:11,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 13:52:11,522 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:11,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 354 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 774 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2025-03-16 13:52:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-16 13:52:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 77. [2025-03-16 13:52:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 13:52:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2025-03-16 13:52:11,531 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 75 [2025-03-16 13:52:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:11,531 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2025-03-16 13:52:11,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 29 states have internal predecessors, (69), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 15 states have call predecessors, (17), 13 states have call successors, (17) [2025-03-16 13:52:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2025-03-16 13:52:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-16 13:52:11,532 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:11,532 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:11,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 13:52:11,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:11,732 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:11,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1759516767, now seen corresponding path program 16 times [2025-03-16 13:52:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498306442] [2025-03-16 13:52:11,733 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:11,738 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 13:52:11,746 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 13:52:11,746 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:11,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498306442] [2025-03-16 13:52:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498306442] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271095981] [2025-03-16 13:52:12,109 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:12,110 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 13:52:12,112 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 13:52:12,163 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 13:52:12,190 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 13:52:12,190 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:12,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:12,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-16 13:52:12,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:12,473 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 13:52:12,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:52:12,839 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 13:52:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-16 13:52:12,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:13,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:13,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-16 13:52:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271095981] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:13,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 43 [2025-03-16 13:52:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895734173] [2025-03-16 13:52:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:13,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-16 13:52:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:13,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-16 13:52:13,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 13:52:13,125 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-16 13:52:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:13,784 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2025-03-16 13:52:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 13:52:13,785 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 81 [2025-03-16 13:52:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:13,785 INFO L225 Difference]: With dead ends: 149 [2025-03-16 13:52:13,785 INFO L226 Difference]: Without dead ends: 147 [2025-03-16 13:52:13,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=2739, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:52:13,787 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:13,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 546 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:52:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-16 13:52:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2025-03-16 13:52:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 85 states have internal predecessors, (89), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 13:52:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2025-03-16 13:52:13,801 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 81 [2025-03-16 13:52:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:13,801 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2025-03-16 13:52:13,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-16 13:52:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2025-03-16 13:52:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-16 13:52:13,802 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:13,802 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:13,808 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 13:52:14,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-16 13:52:14,006 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:14,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1983998124, now seen corresponding path program 17 times [2025-03-16 13:52:14,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:14,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438149242] [2025-03-16 13:52:14,007 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:14,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:14,012 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 9 equivalence classes. [2025-03-16 13:52:14,027 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 84 of 84 statements. [2025-03-16 13:52:14,028 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:52:14,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438149242] [2025-03-16 13:52:14,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438149242] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933655422] [2025-03-16 13:52:14,418 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:14,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:14,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:14,420 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 13:52:14,422 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 13:52:14,472 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 9 equivalence classes. [2025-03-16 13:52:14,499 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 84 of 84 statements. [2025-03-16 13:52:14,500 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:52:14,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:14,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-16 13:52:14,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:14,818 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 13:52:15,091 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 13:52:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:15,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:15,257 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 13:52:15,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:52:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933655422] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:15,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 44 [2025-03-16 13:52:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967016217] [2025-03-16 13:52:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 13:52:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:15,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 13:52:15,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:52:15,367 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 40 states have internal predecessors, (86), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-16 13:52:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:16,068 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2025-03-16 13:52:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 13:52:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 40 states have internal predecessors, (86), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 84 [2025-03-16 13:52:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:16,070 INFO L225 Difference]: With dead ends: 152 [2025-03-16 13:52:16,070 INFO L226 Difference]: Without dead ends: 150 [2025-03-16 13:52:16,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=2663, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:52:16,071 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 131 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:16,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 665 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:52:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-03-16 13:52:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 109. [2025-03-16 13:52:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 88 states have internal predecessors, (92), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 13:52:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2025-03-16 13:52:16,088 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 84 [2025-03-16 13:52:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:16,088 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2025-03-16 13:52:16,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 40 states have internal predecessors, (86), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-16 13:52:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2025-03-16 13:52:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-16 13:52:16,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:16,089 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:16,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 13:52:16,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 13:52:16,290 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:16,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2089223313, now seen corresponding path program 18 times [2025-03-16 13:52:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733909066] [2025-03-16 13:52:16,290 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:16,296 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 85 statements into 10 equivalence classes. [2025-03-16 13:52:16,312 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 85 of 85 statements. [2025-03-16 13:52:16,312 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:52:16,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-16 13:52:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733909066] [2025-03-16 13:52:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733909066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:16,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829851428] [2025-03-16 13:52:16,744 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:16,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:16,745 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 13:52:16,747 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 13:52:16,799 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 85 statements into 10 equivalence classes. [2025-03-16 13:52:16,880 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 85 of 85 statements. [2025-03-16 13:52:16,880 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:52:16,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:16,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-16 13:52:16,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:17,122 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 13:52:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:17,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:17,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:17,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:17,562 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 13:52:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 93 proven. 139 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 13:52:17,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:17,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-16 13:52:17,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-16 13:52:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-16 13:52:17,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829851428] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:17,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:17,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 21] total 44 [2025-03-16 13:52:17,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440456194] [2025-03-16 13:52:17,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:17,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 13:52:17,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:17,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 13:52:17,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:52:17,881 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-03-16 13:52:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:18,478 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2025-03-16 13:52:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 13:52:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 85 [2025-03-16 13:52:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:18,479 INFO L225 Difference]: With dead ends: 139 [2025-03-16 13:52:18,479 INFO L226 Difference]: Without dead ends: 137 [2025-03-16 13:52:18,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=2733, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:52:18,480 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:18,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 365 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:52:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-03-16 13:52:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2025-03-16 13:52:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 13:52:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2025-03-16 13:52:18,494 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 85 [2025-03-16 13:52:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:18,494 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2025-03-16 13:52:18,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-03-16 13:52:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2025-03-16 13:52:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-16 13:52:18,495 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:18,495 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:18,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:18,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:18,695 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:18,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2050942657, now seen corresponding path program 19 times [2025-03-16 13:52:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:18,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559660552] [2025-03-16 13:52:18,696 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:18,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-16 13:52:18,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-16 13:52:18,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:18,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-16 13:52:18,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:18,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559660552] [2025-03-16 13:52:18,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559660552] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:18,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493606815] [2025-03-16 13:52:18,877 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:18,879 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 13:52:18,881 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 13:52:18,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-16 13:52:18,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-16 13:52:18,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:18,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:18,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 13:52:18,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-16 13:52:19,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-16 13:52:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493606815] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:19,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:19,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2025-03-16 13:52:19,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629321256] [2025-03-16 13:52:19,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:19,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 13:52:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:19,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 13:52:19,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2025-03-16 13:52:19,332 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-16 13:52:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:19,467 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2025-03-16 13:52:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:52:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 87 [2025-03-16 13:52:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:19,468 INFO L225 Difference]: With dead ends: 149 [2025-03-16 13:52:19,468 INFO L226 Difference]: Without dead ends: 122 [2025-03-16 13:52:19,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:52:19,469 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:19,469 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 151 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-03-16 13:52:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2025-03-16 13:52:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 13:52:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2025-03-16 13:52:19,481 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 87 [2025-03-16 13:52:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:19,481 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2025-03-16 13:52:19,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-16 13:52:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2025-03-16 13:52:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-16 13:52:19,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:19,482 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:19,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:19,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:19,683 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:19,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1018728369, now seen corresponding path program 20 times [2025-03-16 13:52:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665676468] [2025-03-16 13:52:19,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:19,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-03-16 13:52:19,698 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 13:52:19,698 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:19,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-16 13:52:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665676468] [2025-03-16 13:52:20,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665676468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936914218] [2025-03-16 13:52:20,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:20,096 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 13:52:20,097 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 13:52:20,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-03-16 13:52:20,173 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 13:52:20,173 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:20,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:20,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:52:20,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:20,491 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 13:52:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:20,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:20,817 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 13:52:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 54 proven. 173 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:52:20,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:21,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:21,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-16 13:52:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-16 13:52:21,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936914218] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:21,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:21,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 23] total 46 [2025-03-16 13:52:21,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273632869] [2025-03-16 13:52:21,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:21,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:52:21,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:21,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:52:21,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:52:21,167 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 42 states have internal predecessors, (96), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-03-16 13:52:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:21,788 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2025-03-16 13:52:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:52:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 42 states have internal predecessors, (96), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 91 [2025-03-16 13:52:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:21,789 INFO L225 Difference]: With dead ends: 117 [2025-03-16 13:52:21,789 INFO L226 Difference]: Without dead ends: 115 [2025-03-16 13:52:21,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 150 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=2877, Unknown=0, NotChecked=0, Total=3192 [2025-03-16 13:52:21,790 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:21,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 519 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:52:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-16 13:52:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2025-03-16 13:52:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 13:52:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2025-03-16 13:52:21,808 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 91 [2025-03-16 13:52:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:21,809 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2025-03-16 13:52:21,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 42 states have internal predecessors, (96), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2025-03-16 13:52:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2025-03-16 13:52:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-16 13:52:21,809 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:21,809 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:21,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0