./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:28:29,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:28:29,576 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:28:29,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:28:29,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:28:29,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:28:29,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:28:29,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:28:29,607 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:28:29,607 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:28:29,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:28:29,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:28:29,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:28:29,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:28:29,609 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:28:29,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:28:29,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:28:29,609 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:28:29,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:28:29,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:28:29,610 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:28:29,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:28:29,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:28:29,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:28:29,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:28:29,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:28:29,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:28:29,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:28:29,611 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 -> 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 [2025-03-16 18:28:29,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:28:29,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:28:29,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:28:29,818 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:28:29,818 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:28:29,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2025-03-16 18:28:30,949 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8103aa22/8cbef70bede7409b999b35d0da4d824e/FLAG37faba550 [2025-03-16 18:28:31,162 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:28:31,166 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2025-03-16 18:28:31,177 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8103aa22/8cbef70bede7409b999b35d0da4d824e/FLAG37faba550 [2025-03-16 18:28:31,514 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8103aa22/8cbef70bede7409b999b35d0da4d824e [2025-03-16 18:28:31,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:28:31,517 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:28:31,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:28:31,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:28:31,522 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:28:31,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69796613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31, skipping insertion in model container [2025-03-16 18:28:31,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,534 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:28:31,619 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/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2025-03-16 18:28:31,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:28:31,640 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:28:31,647 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/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2025-03-16 18:28:31,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:28:31,660 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:28:31,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31 WrapperNode [2025-03-16 18:28:31,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:28:31,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:28:31,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:28:31,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:28:31,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,677 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2025-03-16 18:28:31,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:28:31,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:28:31,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:28:31,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:28:31,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,684 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,690 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 18:28:31,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,691 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:28:31,694 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:28:31,694 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:28:31,694 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:28:31,694 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (1/1) ... [2025-03-16 18:28:31,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:28:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:31,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:28:31,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:28:31,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:28:31,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:28:31,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:28:31,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:28:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:28:31,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:28:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:28:31,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:28:31,790 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:28:31,792 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:28:31,894 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-16 18:28:31,894 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:28:31,900 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:28:31,900 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:28:31,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:28:31 BoogieIcfgContainer [2025-03-16 18:28:31,900 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:28:31,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:28:31,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:28:31,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:28:31,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:28:31" (1/3) ... [2025-03-16 18:28:31,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65155cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:28:31, skipping insertion in model container [2025-03-16 18:28:31,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:28:31" (2/3) ... [2025-03-16 18:28:31,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65155cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:28:31, skipping insertion in model container [2025-03-16 18:28:31,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:28:31" (3/3) ... [2025-03-16 18:28:31,906 INFO L128 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2025-03-16 18:28:31,916 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:28:31,917 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ps6-ll_valuebound1.c that has 3 procedures, 21 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-16 18:28:31,946 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:28:31,953 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;@1af8f4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:28:31,953 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:28:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:28:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 18:28:31,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:28:31,960 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:28:31,960 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:28:31,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:28:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1210727227, now seen corresponding path program 1 times [2025-03-16 18:28:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:28:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273696490] [2025-03-16 18:28:31,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:28:32,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 18:28:32,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 18:28:32,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:28:32,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:28:32,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273696490] [2025-03-16 18:28:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273696490] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:28:32,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540276076] [2025-03-16 18:28:32,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:32,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:28:32,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:28:32,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 18:28:32,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 18:28:32,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:32,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:28:32,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:28:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:28:32,149 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:28:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540276076] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:28:32,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:28:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:28:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553177514] [2025-03-16 18:28:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:28:32,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:28:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:28:32,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:28:32,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:28:32,173 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:28:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:28:32,186 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2025-03-16 18:28:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:28:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2025-03-16 18:28:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:28:32,192 INFO L225 Difference]: With dead ends: 40 [2025-03-16 18:28:32,192 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 18:28:32,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:28:32,198 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:28:32,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:28:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 18:28:32,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-16 18:28:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 18:28:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-16 18:28:32,227 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2025-03-16 18:28:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:28:32,228 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-16 18:28:32,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:28:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-16 18:28:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 18:28:32,229 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:28:32,229 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:28:32,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 18:28:32,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 18:28:32,430 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:28:32,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:28:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1634832741, now seen corresponding path program 1 times [2025-03-16 18:28:32,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:28:32,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026642484] [2025-03-16 18:28:32,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:28:32,435 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 18:28:32,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 18:28:32,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:28:32,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463474095] [2025-03-16 18:28:32,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:32,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:28:32,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:28:32,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 18:28:32,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 18:28:32,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:32,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:28:32,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:28:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:28:32,557 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:28:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:28:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026642484] [2025-03-16 18:28:32,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:28:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463474095] [2025-03-16 18:28:32,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463474095] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:28:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:28:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:28:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596627674] [2025-03-16 18:28:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:28:32,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:28:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:28:32,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:28:32,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:28:32,559 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:28:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:28:32,598 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2025-03-16 18:28:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:28:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2025-03-16 18:28:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:28:32,599 INFO L225 Difference]: With dead ends: 28 [2025-03-16 18:28:32,599 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 18:28:32,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:28:32,600 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:28:32,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:28:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 18:28:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-16 18:28:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:28:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-16 18:28:32,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2025-03-16 18:28:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:28:32,605 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-16 18:28:32,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:28:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-16 18:28:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 18:28:32,605 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:28:32,605 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:28:32,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 18:28:32,806 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,SelfDestructingSolverStorable1 [2025-03-16 18:28:32,806 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:28:32,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:28:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1581387456, now seen corresponding path program 1 times [2025-03-16 18:28:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:28:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440658239] [2025-03-16 18:28:32,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:28:32,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 18:28:32,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 18:28:32,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:28:32,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392709034] [2025-03-16 18:28:32,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:32,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:32,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:32,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:28:32,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:28:32,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 18:28:32,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 18:28:32,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:32,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:32,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:28:32,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:28:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:28:32,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:28:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 18:28:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:28:32,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440658239] [2025-03-16 18:28:32,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:28:32,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392709034] [2025-03-16 18:28:32,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392709034] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:28:32,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:28:32,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-16 18:28:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876733782] [2025-03-16 18:28:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:28:32,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:28:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:28:33,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:28:33,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:28:33,000 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:28:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:28:33,034 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2025-03-16 18:28:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:28:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2025-03-16 18:28:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:28:33,035 INFO L225 Difference]: With dead ends: 30 [2025-03-16 18:28:33,035 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 18:28:33,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:28:33,036 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:28:33,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:28:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 18:28:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 18:28:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:28:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-03-16 18:28:33,043 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2025-03-16 18:28:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:28:33,043 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-03-16 18:28:33,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:28:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-03-16 18:28:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 18:28:33,045 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:28:33,045 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:28:33,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:28:33,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:33,246 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:28:33,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:28:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash 957613584, now seen corresponding path program 1 times [2025-03-16 18:28:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:28:33,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332087021] [2025-03-16 18:28:33,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:33,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:28:33,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:28:33,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:28:33,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:33,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:28:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597377201] [2025-03-16 18:28:33,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:28:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:33,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:28:33,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:28:33,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:28:33,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:28:33,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:28:33,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:33,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 18:28:33,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:28:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:28:33,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:28:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:28:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:28:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332087021] [2025-03-16 18:28:33,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:28:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597377201] [2025-03-16 18:28:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597377201] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:28:33,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:28:33,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2025-03-16 18:28:33,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768524531] [2025-03-16 18:28:33,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:28:33,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:28:33,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:28:33,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:28:33,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:28:33,500 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-16 18:28:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:28:33,594 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2025-03-16 18:28:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:28:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2025-03-16 18:28:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:28:33,595 INFO L225 Difference]: With dead ends: 40 [2025-03-16 18:28:33,595 INFO L226 Difference]: Without dead ends: 32 [2025-03-16 18:28:33,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:28:33,595 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:28:33,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 106 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:28:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-16 18:28:33,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-16 18:28:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:28:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-03-16 18:28:33,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 33 [2025-03-16 18:28:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:28:33,603 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-03-16 18:28:33,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-16 18:28:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-03-16 18:28:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 18:28:33,604 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:28:33,604 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:28:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:28:33,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:33,805 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:28:33,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:28:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1577142465, now seen corresponding path program 2 times [2025-03-16 18:28:33,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:28:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770803817] [2025-03-16 18:28:33,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:28:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:28:33,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-16 18:28:33,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:28:33,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:28:33,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-16 18:28:34,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:28:34,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770803817] [2025-03-16 18:28:34,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770803817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:28:34,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618544220] [2025-03-16 18:28:34,109 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:28:34,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:34,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:28:34,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:28:34,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:28:34,140 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-16 18:28:34,156 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:28:34,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:28:34,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:28:34,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 18:28:34,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:28:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 18:28:34,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:28:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-16 18:28:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618544220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:28:34,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:28:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-03-16 18:28:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706118010] [2025-03-16 18:28:34,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:28:34,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 18:28:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:28:34,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 18:28:34,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:28:34,380 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2025-03-16 18:28:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:28:34,441 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2025-03-16 18:28:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:28:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) Word has length 51 [2025-03-16 18:28:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:28:34,441 INFO L225 Difference]: With dead ends: 38 [2025-03-16 18:28:34,442 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 18:28:34,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:28:34,442 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:28:34,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:28:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 18:28:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 18:28:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:28:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 18:28:34,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2025-03-16 18:28:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:28:34,444 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 18:28:34,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2025-03-16 18:28:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 18:28:34,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 18:28:34,449 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:28:34,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:28:34,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:28:34,652 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-03-16 18:28:34,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 18:28:34,724 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:28:34,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:28:34 BoogieIcfgContainer [2025-03-16 18:28:34,732 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:28:34,732 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:28:34,732 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:28:34,732 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:28:34,733 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:28:31" (3/4) ... [2025-03-16 18:28:34,735 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 18:28:34,739 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-03-16 18:28:34,739 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 18:28:34,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-03-16 18:28:34,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-16 18:28:34,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-16 18:28:34,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:28:34,796 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:28:34,796 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:28:34,797 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:28:34,797 INFO L158 Benchmark]: Toolchain (without parser) took 3279.95ms. Allocated memory is still 142.6MB. Free memory was 106.8MB in the beginning and 50.9MB in the end (delta: 55.9MB). Peak memory consumption was 58.2MB. Max. memory is 16.1GB. [2025-03-16 18:28:34,797 INFO L158 Benchmark]: CDTParser took 0.97ms. Allocated memory is still 201.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:28:34,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.77ms. Allocated memory is still 142.6MB. Free memory was 106.8MB in the beginning and 95.3MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:28:34,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.46ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.4MB in the end (delta: 876.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:28:34,799 INFO L158 Benchmark]: Boogie Preprocessor took 15.31ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 93.5MB in the end (delta: 890.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:28:34,799 INFO L158 Benchmark]: IcfgBuilder took 206.64ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 82.1MB in the end (delta: 11.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 18:28:34,799 INFO L158 Benchmark]: TraceAbstraction took 2830.08ms. Allocated memory is still 142.6MB. Free memory was 81.2MB in the beginning and 55.7MB in the end (delta: 25.5MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2025-03-16 18:28:34,799 INFO L158 Benchmark]: Witness Printer took 64.43ms. Allocated memory is still 142.6MB. Free memory was 55.7MB in the beginning and 50.9MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:28:34,801 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97ms. Allocated memory is still 201.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.77ms. Allocated memory is still 142.6MB. Free memory was 106.8MB in the beginning and 95.3MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.46ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.4MB in the end (delta: 876.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.31ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 93.5MB in the end (delta: 890.2kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 206.64ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 82.1MB in the end (delta: 11.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2830.08ms. Allocated memory is still 142.6MB. Free memory was 81.2MB in the beginning and 55.7MB in the end (delta: 25.5MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. * Witness Printer took 64.43ms. Allocated memory is still 142.6MB. Free memory was 55.7MB in the beginning and 50.9MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 32 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 335 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 245 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 146 IncrementalHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 90 mSDtfsCounter, 146 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 276 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 716 SizeOfPredicates, 4 NumberOfNonLiveVariables, 414 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 340/362 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Location Invariant Derived location invariant: (((((k == 1) && (c == 1)) && (x == 1)) && (y == 1)) || (((((0 <= k) && (c == 0)) && (k <= 1)) && (y == 0)) && (x == 0))) RESULT: Ultimate proved your program to be correct! [2025-03-16 18:28:34,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE