./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:08:23,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:08:23,171 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:08:23,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:08:23,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:08:23,205 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:08:23,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:08:23,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:08:23,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:08:23,207 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:08:23,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:08:23,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:08:23,208 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:08:23,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:08:23,208 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:08:23,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:08:23,209 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:08:23,210 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:08:23,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:08:23,210 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:08:23,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:08:23,211 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 -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2025-03-08 00:08:23,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:08:23,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:08:23,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:08:23,525 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:08:23,525 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:08:23,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2025-03-08 00:08:24,821 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e211985/e46dcf58783d44b5b477e7f9a1baeb3b/FLAGe9cc12cb1 [2025-03-08 00:08:25,096 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:08:25,098 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2025-03-08 00:08:25,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e211985/e46dcf58783d44b5b477e7f9a1baeb3b/FLAGe9cc12cb1 [2025-03-08 00:08:25,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e211985/e46dcf58783d44b5b477e7f9a1baeb3b [2025-03-08 00:08:25,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:08:25,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:08:25,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:08:25,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:08:25,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:08:25,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bda406e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25, skipping insertion in model container [2025-03-08 00:08:25,132 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:08:25,259 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2025-03-08 00:08:25,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:08:25,283 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:08:25,293 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2025-03-08 00:08:25,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:08:25,320 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:08:25,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25 WrapperNode [2025-03-08 00:08:25,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:08:25,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:08:25,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:08:25,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:08:25,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,349 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2025-03-08 00:08:25,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:08:25,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:08:25,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:08:25,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:08:25,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,358 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,369 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2025-03-08 00:08:25,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,376 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:08:25,380 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:08:25,380 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:08:25,380 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:08:25,381 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (1/1) ... [2025-03-08 00:08:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:08:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:25,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 00:08:25,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 00:08:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:08:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:08:25,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:08:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:08:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:08:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 00:08:25,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 00:08:25,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:08:25,508 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:08:25,510 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:08:25,680 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L18: call ULTIMATE.dealloc(main_~#array~0#1.base, main_~#array~0#1.offset);havoc main_~#array~0#1.base, main_~#array~0#1.offset; [2025-03-08 00:08:25,695 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-08 00:08:25,695 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:08:25,703 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:08:25,703 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:08:25,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:08:25 BoogieIcfgContainer [2025-03-08 00:08:25,704 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:08:25,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:08:25,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:08:25,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:08:25,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:08:25" (1/3) ... [2025-03-08 00:08:25,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7372f7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:08:25, skipping insertion in model container [2025-03-08 00:08:25,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:08:25" (2/3) ... [2025-03-08 00:08:25,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7372f7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:08:25, skipping insertion in model container [2025-03-08 00:08:25,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:08:25" (3/3) ... [2025-03-08 00:08:25,713 INFO L128 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2025-03-08 00:08:25,725 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:08:25,727 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sanfoundry_02_ground.i that has 2 procedures, 25 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 00:08:25,768 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:08:25,779 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;@6b6cbe35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:08:25,779 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:08:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 00:08:25,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:25,788 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:25,788 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:25,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash 312218832, now seen corresponding path program 1 times [2025-03-08 00:08:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533452370] [2025-03-08 00:08:25,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:08:25,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:25,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 00:08:25,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 00:08:25,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:08:25,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:08:25,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533452370] [2025-03-08 00:08:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533452370] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:08:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:08:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:08:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724319659] [2025-03-08 00:08:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:08:25,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:08:25,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:25,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:08:25,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:08:25,997 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:26,029 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2025-03-08 00:08:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:08:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-08 00:08:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:26,035 INFO L225 Difference]: With dead ends: 48 [2025-03-08 00:08:26,035 INFO L226 Difference]: Without dead ends: 23 [2025-03-08 00:08:26,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:08:26,040 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:26,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:08:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-08 00:08:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-08 00:08:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2025-03-08 00:08:26,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2025-03-08 00:08:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:26,067 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2025-03-08 00:08:26,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2025-03-08 00:08:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 00:08:26,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:26,067 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:26,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:08:26,068 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:26,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash 944381368, now seen corresponding path program 1 times [2025-03-08 00:08:26,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474026871] [2025-03-08 00:08:26,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:08:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:26,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:08:26,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:08:26,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:08:26,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:08:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474026871] [2025-03-08 00:08:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474026871] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:26,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392694867] [2025-03-08 00:08:26,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:08:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:26,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:26,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:08:26,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:08:26,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:08:26,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:08:26,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:26,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-08 00:08:26,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:08:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:08:26,287 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:08:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392694867] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:08:26,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:08:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-08 00:08:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77596911] [2025-03-08 00:08:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:08:26,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:08:26,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:26,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:08:26,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:08:26,290 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:26,323 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2025-03-08 00:08:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:08:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-08 00:08:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:26,326 INFO L225 Difference]: With dead ends: 40 [2025-03-08 00:08:26,326 INFO L226 Difference]: Without dead ends: 27 [2025-03-08 00:08:26,326 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:08:26,327 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:26,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:08:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-08 00:08:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2025-03-08 00:08:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-03-08 00:08:26,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2025-03-08 00:08:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:26,336 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-03-08 00:08:26,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-03-08 00:08:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 00:08:26,336 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:26,336 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:26,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 00:08:26,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:26,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:26,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2097635310, now seen corresponding path program 1 times [2025-03-08 00:08:26,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:26,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45228120] [2025-03-08 00:08:26,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:08:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:26,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:08:26,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:08:26,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:08:26,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:08:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45228120] [2025-03-08 00:08:26,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45228120] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985258771] [2025-03-08 00:08:26,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:08:26,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:26,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:26,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:26,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:08:26,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:08:26,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:08:26,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:08:26,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:26,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 00:08:26,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:08:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:08:26,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:08:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:08:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985258771] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:08:26,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:08:26,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 00:08:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618282453] [2025-03-08 00:08:26,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:08:26,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:08:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:26,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:08:26,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:08:26,754 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:26,803 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2025-03-08 00:08:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:08:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-08 00:08:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:26,805 INFO L225 Difference]: With dead ends: 51 [2025-03-08 00:08:26,805 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 00:08:26,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:08:26,806 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:26,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:08:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 00:08:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-03-08 00:08:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2025-03-08 00:08:26,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 15 [2025-03-08 00:08:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:26,814 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2025-03-08 00:08:26,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2025-03-08 00:08:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 00:08:26,815 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:26,815 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:26,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:08:27,015 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 [2025-03-08 00:08:27,016 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:27,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash -828298992, now seen corresponding path program 2 times [2025-03-08 00:08:27,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:27,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500814580] [2025-03-08 00:08:27,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:08:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:27,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 00:08:27,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 00:08:27,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:08:27,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:08:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:27,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500814580] [2025-03-08 00:08:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500814580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170939851] [2025-03-08 00:08:27,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:08:27,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:27,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:27,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:27,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:08:27,215 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 00:08:27,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 00:08:27,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:08:27,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:27,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:08:27,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:08:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 00:08:27,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:08:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 00:08:27,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170939851] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:08:27,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:08:27,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2025-03-08 00:08:27,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028829252] [2025-03-08 00:08:27,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:08:27,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:08:27,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:27,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:08:27,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:08:27,338 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:27,460 INFO L93 Difference]: Finished difference Result 85 states and 128 transitions. [2025-03-08 00:08:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:08:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-08 00:08:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:27,462 INFO L225 Difference]: With dead ends: 85 [2025-03-08 00:08:27,463 INFO L226 Difference]: Without dead ends: 61 [2025-03-08 00:08:27,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:08:27,466 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:27,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 52 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:08:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-08 00:08:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-08 00:08:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 57 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2025-03-08 00:08:27,474 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 21 [2025-03-08 00:08:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:27,474 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2025-03-08 00:08:27,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2025-03-08 00:08:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:08:27,475 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:27,476 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:27,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:08:27,676 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 [2025-03-08 00:08:27,677 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:27,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -368546096, now seen corresponding path program 3 times [2025-03-08 00:08:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653844105] [2025-03-08 00:08:27,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:08:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:27,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 9 equivalence classes. [2025-03-08 00:08:27,747 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 36 of 45 statements. [2025-03-08 00:08:27,747 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:08:27,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 00:08:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653844105] [2025-03-08 00:08:28,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653844105] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54419515] [2025-03-08 00:08:28,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:08:28,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:28,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:28,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:08:28,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 9 equivalence classes. [2025-03-08 00:08:28,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 36 of 45 statements. [2025-03-08 00:08:28,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:08:28,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:28,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:08:28,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:08:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 00:08:28,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:08:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 00:08:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54419515] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:08:28,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:08:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-08 00:08:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494592367] [2025-03-08 00:08:28,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:08:28,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:08:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:28,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:08:28,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:08:28,374 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:28,614 INFO L93 Difference]: Finished difference Result 169 states and 260 transitions. [2025-03-08 00:08:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:08:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-08 00:08:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:28,619 INFO L225 Difference]: With dead ends: 169 [2025-03-08 00:08:28,619 INFO L226 Difference]: Without dead ends: 121 [2025-03-08 00:08:28,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:08:28,621 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 255 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:28,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 121 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:08:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-08 00:08:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2025-03-08 00:08:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.393162393162393) internal successors, (163), 117 states have internal predecessors, (163), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2025-03-08 00:08:28,636 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 45 [2025-03-08 00:08:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:28,636 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2025-03-08 00:08:28,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2025-03-08 00:08:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-08 00:08:28,639 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:28,639 INFO L218 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:28,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 00:08:28,844 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 [2025-03-08 00:08:28,844 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:28,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash 697969232, now seen corresponding path program 4 times [2025-03-08 00:08:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208714592] [2025-03-08 00:08:28,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:08:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:28,890 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-03-08 00:08:28,933 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-08 00:08:28,934 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:08:28,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-08 00:08:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208714592] [2025-03-08 00:08:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208714592] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258020613] [2025-03-08 00:08:29,557 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:08:29,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:29,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:08:29,619 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-03-08 00:08:29,687 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-08 00:08:29,687 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:08:29,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:29,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 00:08:29,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:08:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-08 00:08:29,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:08:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-08 00:08:30,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258020613] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:08:30,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:08:30,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2025-03-08 00:08:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249860214] [2025-03-08 00:08:30,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:08:30,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 00:08:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:08:30,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 00:08:30,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:08:30,545 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:08:31,129 INFO L93 Difference]: Finished difference Result 325 states and 502 transitions. [2025-03-08 00:08:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-08 00:08:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2025-03-08 00:08:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:08:31,135 INFO L225 Difference]: With dead ends: 325 [2025-03-08 00:08:31,135 INFO L226 Difference]: Without dead ends: 229 [2025-03-08 00:08:31,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:08:31,138 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 502 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:08:31,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 141 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:08:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-03-08 00:08:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2025-03-08 00:08:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.4) internal successors, (315), 225 states have internal predecessors, (315), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:08:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2025-03-08 00:08:31,153 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 93 [2025-03-08 00:08:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:08:31,153 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2025-03-08 00:08:31,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:08:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2025-03-08 00:08:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2025-03-08 00:08:31,156 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:08:31,156 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:08:31,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:08:31,357 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 [2025-03-08 00:08:31,357 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:08:31,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:08:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash -187269872, now seen corresponding path program 5 times [2025-03-08 00:08:31,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:08:31,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354401735] [2025-03-08 00:08:31,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:08:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:08:31,397 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 179 statements into 43 equivalence classes. [2025-03-08 00:08:31,894 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) and asserted 179 of 179 statements. [2025-03-08 00:08:31,895 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2025-03-08 00:08:31,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:08:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2025-03-08 00:08:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:08:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354401735] [2025-03-08 00:08:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354401735] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:08:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557259114] [2025-03-08 00:08:33,641 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:08:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:08:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:08:33,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:08:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:08:33,762 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 179 statements into 43 equivalence classes. [2025-03-08 00:09:38,557 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) and asserted 179 of 179 statements. [2025-03-08 00:09:38,558 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2025-03-08 00:09:38,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:09:38,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 00:09:38,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:09:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2025-03-08 00:09:38,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:09:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2025-03-08 00:09:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557259114] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:09:40,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:09:40,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 90 [2025-03-08 00:09:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541394779] [2025-03-08 00:09:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:09:40,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-03-08 00:09:40,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:09:40,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-03-08 00:09:40,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2025-03-08 00:09:40,281 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:09:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:09:41,574 INFO L93 Difference]: Finished difference Result 635 states and 992 transitions. [2025-03-08 00:09:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2025-03-08 00:09:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2025-03-08 00:09:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:09:41,577 INFO L225 Difference]: With dead ends: 635 [2025-03-08 00:09:41,577 INFO L226 Difference]: Without dead ends: 451 [2025-03-08 00:09:41,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2025-03-08 00:09:41,580 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 1126 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:09:41,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 243 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:09:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2025-03-08 00:09:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2025-03-08 00:09:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.3982102908277405) internal successors, (625), 447 states have internal predecessors, (625), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:09:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 629 transitions. [2025-03-08 00:09:41,596 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 629 transitions. Word has length 179 [2025-03-08 00:09:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:09:41,596 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 629 transitions. [2025-03-08 00:09:41,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:09:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 629 transitions. [2025-03-08 00:09:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2025-03-08 00:09:41,603 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:09:41,603 INFO L218 NwaCegarLoop]: trace histogram [88, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:09:41,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 00:09:41,804 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 [2025-03-08 00:09:41,804 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:09:41,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:09:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -612652656, now seen corresponding path program 6 times [2025-03-08 00:09:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:09:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431341272] [2025-03-08 00:09:41,805 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:09:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:09:41,857 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 357 statements into 87 equivalence classes. [2025-03-08 00:09:44,858 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) and asserted 357 of 357 statements. [2025-03-08 00:09:44,858 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2025-03-08 00:09:44,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:09:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14967 backedges. 0 proven. 11051 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2025-03-08 00:09:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:09:49,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431341272] [2025-03-08 00:09:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431341272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:09:49,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6823881] [2025-03-08 00:09:49,321 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:09:49,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:09:49,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:09:49,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:09:49,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:09:49,456 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 357 statements into 87 equivalence classes.