./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.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/egcd-ll_valuebound5.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 3f9b33d2a8120d9ea8a3a6c5d650c2a90b549ffb583b3e9890b411aeb4530efd --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:08:54,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:08:54,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:08:54,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:08:54,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:08:54,850 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:08:54,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:08:54,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:08:54,852 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:08:54,852 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:08:54,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:08:54,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:08:54,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:08:54,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:08:54,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:08:54,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:08:54,855 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:08:54,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:08:54,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:08:54,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:08:54,856 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 -> 3f9b33d2a8120d9ea8a3a6c5d650c2a90b549ffb583b3e9890b411aeb4530efd [2025-03-16 18:08:55,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:08:55,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:08:55,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:08:55,074 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:08:55,074 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:08:55,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2025-03-16 18:08:56,207 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62851653c/aec1c50a8e8a4340a39c14963330993c/FLAG1a7228f57 [2025-03-16 18:08:56,402 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:08:56,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2025-03-16 18:08:56,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62851653c/aec1c50a8e8a4340a39c14963330993c/FLAG1a7228f57 [2025-03-16 18:08:56,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62851653c/aec1c50a8e8a4340a39c14963330993c [2025-03-16 18:08:56,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:08:56,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:08:56,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:08:56,776 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:08:56,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:08:56,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10913a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56, skipping insertion in model container [2025-03-16 18:08:56,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,790 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:08:56,891 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/egcd-ll_valuebound5.c[489,502] [2025-03-16 18:08:56,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:08:56,920 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:08:56,928 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/egcd-ll_valuebound5.c[489,502] [2025-03-16 18:08:56,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:08:56,946 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:08:56,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56 WrapperNode [2025-03-16 18:08:56,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:08:56,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:08:56,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:08:56,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:08:56,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,967 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2025-03-16 18:08:56,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:08:56,968 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:08:56,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:08:56,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:08:56,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,975 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,983 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 18:08:56,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,986 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:56,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:08:56,996 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:08:56,996 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:08:56,996 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:08:56,997 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (1/1) ... [2025-03-16 18:08:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:08:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:57,022 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 18:08:57,024 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 18:08:57,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:08:57,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:08:57,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:08:57,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:08:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:08:57,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:08:57,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:08:57,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:08:57,087 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:08:57,089 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:08:57,200 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-03-16 18:08:57,201 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:08:57,208 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:08:57,209 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:08:57,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:08:57 BoogieIcfgContainer [2025-03-16 18:08:57,209 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:08:57,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:08:57,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:08:57,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:08:57,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:08:56" (1/3) ... [2025-03-16 18:08:57,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da86845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:08:57, skipping insertion in model container [2025-03-16 18:08:57,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:56" (2/3) ... [2025-03-16 18:08:57,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da86845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:08:57, skipping insertion in model container [2025-03-16 18:08:57,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:08:57" (3/3) ... [2025-03-16 18:08:57,216 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2025-03-16 18:08:57,227 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:08:57,228 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd-ll_valuebound5.c that has 3 procedures, 29 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-16 18:08:57,268 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:08:57,280 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;@ce62cce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:08:57,281 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:08:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-16 18:08:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 18:08:57,289 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:57,290 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:57,290 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:57,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -719262193, now seen corresponding path program 1 times [2025-03-16 18:08:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507133345] [2025-03-16 18:08:57,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:57,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:08:57,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:08:57,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:57,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 18:08:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507133345] [2025-03-16 18:08:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507133345] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374148442] [2025-03-16 18:08:57,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:57,391 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 18:08:57,393 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 18:08:57,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:08:57,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:08:57,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:57,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:57,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:08:57,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 18:08:57,466 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374148442] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:57,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:57,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:08:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962898628] [2025-03-16 18:08:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:57,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:08:57,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:57,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:08:57,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:08:57,488 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:08:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:57,502 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2025-03-16 18:08:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:08:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2025-03-16 18:08:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:57,507 INFO L225 Difference]: With dead ends: 56 [2025-03-16 18:08:57,507 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 18:08:57,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 18:08:57,511 INFO L435 NwaCegarLoop]: 39 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, 39 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 18:08:57,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 18:08:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 18:08:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:08:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2025-03-16 18:08:57,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 27 [2025-03-16 18:08:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:57,534 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2025-03-16 18:08:57,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:08:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2025-03-16 18:08:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 18:08:57,535 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:57,535 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:57,541 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 18:08:57,736 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 18:08:57,736 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:57,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash -333933971, now seen corresponding path program 1 times [2025-03-16 18:08:57,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:57,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916393845] [2025-03-16 18:08:57,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:57,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:08:57,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:08:57,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:57,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321573585] [2025-03-16 18:08:57,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:57,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:57,770 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 18:08:57,770 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 18:08:57,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:08:57,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:08:57,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:57,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:57,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:08:57,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:08:57,882 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:57,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:57,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916393845] [2025-03-16 18:08:57,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321573585] [2025-03-16 18:08:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321573585] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:57,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:08:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640279794] [2025-03-16 18:08:57,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:57,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:57,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:57,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:08:57,884 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:57,938 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2025-03-16 18:08:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2025-03-16 18:08:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:57,940 INFO L225 Difference]: With dead ends: 41 [2025-03-16 18:08:57,940 INFO L226 Difference]: Without dead ends: 39 [2025-03-16 18:08:57,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 18:08:57,940 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:57,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-16 18:08:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2025-03-16 18:08:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:08:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2025-03-16 18:08:57,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 27 [2025-03-16 18:08:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:57,948 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2025-03-16 18:08:57,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2025-03-16 18:08:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-16 18:08:57,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:57,949 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:57,955 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 18:08:58,149 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 18:08:58,150 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:58,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash -22305521, now seen corresponding path program 1 times [2025-03-16 18:08:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:58,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141562750] [2025-03-16 18:08:58,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:58,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-16 18:08:58,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 18:08:58,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:58,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:58,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264122887] [2025-03-16 18:08:58,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:58,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:58,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:58,172 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 18:08:58,173 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 18:08:58,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-16 18:08:58,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 18:08:58,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:58,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:58,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 18:08:58,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:08:58,266 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141562750] [2025-03-16 18:08:58,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264122887] [2025-03-16 18:08:58,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264122887] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:08:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564174987] [2025-03-16 18:08:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:58,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:58,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:58,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:08:58,269 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:08:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:58,328 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2025-03-16 18:08:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2025-03-16 18:08:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:58,330 INFO L225 Difference]: With dead ends: 61 [2025-03-16 18:08:58,330 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 18:08:58,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 18:08:58,331 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:58,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 18:08:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2025-03-16 18:08:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.375) internal successors, (33), 26 states have internal predecessors, (33), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:08:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 78 transitions. [2025-03-16 18:08:58,349 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 78 transitions. Word has length 32 [2025-03-16 18:08:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:58,350 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 78 transitions. [2025-03-16 18:08:58,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:08:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 78 transitions. [2025-03-16 18:08:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 18:08:58,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:58,351 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:58,357 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 18:08:58,555 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 18:08:58,555 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:58,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1535627245, now seen corresponding path program 1 times [2025-03-16 18:08:58,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:58,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083062739] [2025-03-16 18:08:58,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:58,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:58,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:08:58,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:08:58,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:58,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649627520] [2025-03-16 18:08:58,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:58,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:58,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:58,580 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 18:08:58,582 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 18:08:58,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:08:58,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:08:58,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:58,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:58,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:08:58,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 18:08:58,667 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:58,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:58,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083062739] [2025-03-16 18:08:58,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:58,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649627520] [2025-03-16 18:08:58,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649627520] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:58,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:58,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:08:58,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231108333] [2025-03-16 18:08:58,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:58,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:58,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:58,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:58,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:08:58,668 INFO L87 Difference]: Start difference. First operand 52 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:08:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:58,716 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2025-03-16 18:08:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2025-03-16 18:08:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:58,717 INFO L225 Difference]: With dead ends: 59 [2025-03-16 18:08:58,717 INFO L226 Difference]: Without dead ends: 55 [2025-03-16 18:08:58,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 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 18:08:58,718 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:58,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-16 18:08:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-03-16 18:08:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-03-16 18:08:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2025-03-16 18:08:58,725 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 37 [2025-03-16 18:08:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:58,725 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2025-03-16 18:08:58,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:08:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2025-03-16 18:08:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 18:08:58,726 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:58,726 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:58,732 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 18:08:58,931 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 18:08:58,931 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:58,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -41598106, now seen corresponding path program 1 times [2025-03-16 18:08:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:58,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159902954] [2025-03-16 18:08:58,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:58,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:58,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 18:08:58,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 18:08:58,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:58,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 18:08:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159902954] [2025-03-16 18:08:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159902954] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:59,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:08:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959061937] [2025-03-16 18:08:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:59,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:59,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:59,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:08:59,074 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2025-03-16 18:08:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:59,102 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2025-03-16 18:08:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2025-03-16 18:08:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:59,103 INFO L225 Difference]: With dead ends: 61 [2025-03-16 18:08:59,103 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 18:08:59,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 18:08:59,104 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:59,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 124 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 18:08:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-16 18:08:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-03-16 18:08:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2025-03-16 18:08:59,111 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 43 [2025-03-16 18:08:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:59,111 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2025-03-16 18:08:59,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2025-03-16 18:08:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2025-03-16 18:08:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 18:08:59,111 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:59,112 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:59,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 18:08:59,112 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:59,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1289122233, now seen corresponding path program 1 times [2025-03-16 18:08:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102718848] [2025-03-16 18:08:59,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:59,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 18:08:59,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:08:59,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:59,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:59,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624121357] [2025-03-16 18:08:59,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:59,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:59,135 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 18:08:59,136 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 18:08:59,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 18:08:59,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:08:59,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:59,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:59,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:08:59,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-16 18:08:59,237 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:59,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:59,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102718848] [2025-03-16 18:08:59,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624121357] [2025-03-16 18:08:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624121357] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:08:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811558143] [2025-03-16 18:08:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:59,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:59,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:59,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:08:59,239 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:08:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:59,293 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2025-03-16 18:08:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2025-03-16 18:08:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:59,295 INFO L225 Difference]: With dead ends: 75 [2025-03-16 18:08:59,295 INFO L226 Difference]: Without dead ends: 73 [2025-03-16 18:08:59,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 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 18:08:59,295 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:59,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 113 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-03-16 18:08:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2025-03-16 18:08:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-16 18:08:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2025-03-16 18:08:59,304 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 44 [2025-03-16 18:08:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:59,304 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2025-03-16 18:08:59,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:08:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2025-03-16 18:08:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 18:08:59,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:59,306 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:59,312 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 18:08:59,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:59,506 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:59,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:59,507 INFO L85 PathProgramCache]: Analyzing trace with hash -298033034, now seen corresponding path program 1 times [2025-03-16 18:08:59,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:59,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925911589] [2025-03-16 18:08:59,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:59,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 18:08:59,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 18:08:59,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:59,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-16 18:08:59,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925911589] [2025-03-16 18:08:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925911589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472114126] [2025-03-16 18:08:59,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:59,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:59,700 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:59,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:08:59,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 18:08:59,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 18:08:59,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:59,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:59,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:08:59,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:08:59,814 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472114126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:59,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2025-03-16 18:08:59,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903194020] [2025-03-16 18:08:59,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:59,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:08:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:59,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:08:59,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:08:59,815 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-16 18:08:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:59,881 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2025-03-16 18:08:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:08:59,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 48 [2025-03-16 18:08:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:59,882 INFO L225 Difference]: With dead ends: 83 [2025-03-16 18:08:59,882 INFO L226 Difference]: Without dead ends: 79 [2025-03-16 18:08:59,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:08:59,883 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:59,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-16 18:08:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2025-03-16 18:08:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-16 18:08:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2025-03-16 18:08:59,900 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 48 [2025-03-16 18:08:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:59,900 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2025-03-16 18:08:59,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-16 18:08:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2025-03-16 18:08:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 18:08:59,900 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:59,900 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:59,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:00,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:00,101 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:00,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash -239693738, now seen corresponding path program 1 times [2025-03-16 18:09:00,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:00,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664757669] [2025-03-16 18:09:00,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:00,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:00,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 18:09:00,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 18:09:00,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:00,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:00,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258594937] [2025-03-16 18:09:00,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:00,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:00,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:00,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:09:00,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 18:09:00,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 18:09:00,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:00,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:00,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 18:09:00,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 18:09:00,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664757669] [2025-03-16 18:09:00,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258594937] [2025-03-16 18:09:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258594937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:00,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2025-03-16 18:09:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614169646] [2025-03-16 18:09:00,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:00,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 18:09:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:00,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 18:09:00,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:09:00,482 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2025-03-16 18:09:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:00,830 INFO L93 Difference]: Finished difference Result 123 states and 173 transitions. [2025-03-16 18:09:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:09:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 49 [2025-03-16 18:09:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:00,832 INFO L225 Difference]: With dead ends: 123 [2025-03-16 18:09:00,832 INFO L226 Difference]: Without dead ends: 121 [2025-03-16 18:09:00,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2025-03-16 18:09:00,832 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:00,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 190 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:09:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-16 18:09:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2025-03-16 18:09:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 57 states have internal predecessors, (68), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2025-03-16 18:09:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2025-03-16 18:09:00,853 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 49 [2025-03-16 18:09:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:00,853 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2025-03-16 18:09:00,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2025-03-16 18:09:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2025-03-16 18:09:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 18:09:00,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:00,854 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:00,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:09:01,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:01,058 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:01,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1801764025, now seen corresponding path program 2 times [2025-03-16 18:09:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392280476] [2025-03-16 18:09:01,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:01,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-16 18:09:01,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 18:09:01,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:01,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:01,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232898876] [2025-03-16 18:09:01,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:01,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:01,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:09:01,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-16 18:09:01,116 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 18:09:01,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:01,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:01,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 18:09:01,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-16 18:09:01,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-16 18:09:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392280476] [2025-03-16 18:09:01,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232898876] [2025-03-16 18:09:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232898876] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:01,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:01,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-16 18:09:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74354006] [2025-03-16 18:09:01,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:01,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:09:01,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:01,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:09:01,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:01,321 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2025-03-16 18:09:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:01,750 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2025-03-16 18:09:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:09:01,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2025-03-16 18:09:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:01,751 INFO L225 Difference]: With dead ends: 114 [2025-03-16 18:09:01,751 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 18:09:01,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:09:01,752 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:01,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 18:09:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 18:09:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2025-03-16 18:09:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 53 states have internal predecessors, (63), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-03-16 18:09:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2025-03-16 18:09:01,773 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 54 [2025-03-16 18:09:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:01,774 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2025-03-16 18:09:01,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2025-03-16 18:09:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2025-03-16 18:09:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 18:09:01,776 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:01,776 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:01,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:01,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 18:09:01,977 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:01,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash -729626866, now seen corresponding path program 1 times [2025-03-16 18:09:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:01,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139076502] [2025-03-16 18:09:01,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:01,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:01,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 18:09:01,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:09:01,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:01,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:01,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041756590] [2025-03-16 18:09:01,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:01,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:01,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:01,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:02,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:09:02,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 18:09:02,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:09:02,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:02,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:02,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 18:09:02,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 18:09:02,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 18:09:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139076502] [2025-03-16 18:09:02,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041756590] [2025-03-16 18:09:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041756590] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:02,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2025-03-16 18:09:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001817355] [2025-03-16 18:09:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:02,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:02,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:02,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:02,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:02,216 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:09:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:02,261 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2025-03-16 18:09:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2025-03-16 18:09:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:02,262 INFO L225 Difference]: With dead ends: 99 [2025-03-16 18:09:02,262 INFO L226 Difference]: Without dead ends: 94 [2025-03-16 18:09:02,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:09:02,263 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:02,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-16 18:09:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2025-03-16 18:09:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2025-03-16 18:09:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2025-03-16 18:09:02,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 61 [2025-03-16 18:09:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:02,275 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2025-03-16 18:09:02,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:09:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2025-03-16 18:09:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 18:09:02,276 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:02,276 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:02,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:02,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 18:09:02,480 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:02,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -617751107, now seen corresponding path program 1 times [2025-03-16 18:09:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:02,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929566904] [2025-03-16 18:09:02,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:02,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:09:02,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:09:02,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:02,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 18:09:02,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929566904] [2025-03-16 18:09:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929566904] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843048030] [2025-03-16 18:09:02,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:02,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:02,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:02,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:02,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:09:02,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:09:02,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:09:02,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:02,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:02,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 18:09:02,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 18:09:02,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 18:09:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843048030] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:02,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:09:02,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2025-03-16 18:09:02,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378866788] [2025-03-16 18:09:02,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:02,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 18:09:02,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:02,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 18:09:02,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:09:02,775 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 18:09:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:02,851 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2025-03-16 18:09:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:09:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2025-03-16 18:09:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:02,852 INFO L225 Difference]: With dead ends: 102 [2025-03-16 18:09:02,852 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 18:09:02,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:09:02,853 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:02,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 18:09:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 18:09:02,853 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 18:09:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 18:09:02,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2025-03-16 18:09:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:02,853 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 18:09:02,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 18:09:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 18:09:02,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 18:09:02,856 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:09:02,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:03,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 18:09:03,059 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:03,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 18:09:08,193 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:09:08,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:09:08 BoogieIcfgContainer [2025-03-16 18:09:08,205 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:09:08,206 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:09:08,206 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:09:08,206 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:09:08,206 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:08:57" (3/4) ... [2025-03-16 18:09:08,208 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 18:09:08,211 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-03-16 18:09:08,211 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 18:09:08,213 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-03-16 18:09:08,213 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-16 18:09:08,213 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-16 18:09:08,213 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:09:08,259 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:09:08,259 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:09:08,259 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:09:08,259 INFO L158 Benchmark]: Toolchain (without parser) took 11484.15ms. Allocated memory is still 142.6MB. Free memory was 112.3MB in the beginning and 59.9MB in the end (delta: 52.4MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2025-03-16 18:09:08,259 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:09:08,259 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.12ms. Allocated memory is still 142.6MB. Free memory was 112.3MB in the beginning and 100.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:09:08,260 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.31ms. Allocated memory is still 142.6MB. Free memory was 100.8MB in the beginning and 99.8MB in the end (delta: 998.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:09:08,260 INFO L158 Benchmark]: Boogie Preprocessor took 26.85ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 98.8MB in the end (delta: 997.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:09:08,260 INFO L158 Benchmark]: IcfgBuilder took 213.50ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 86.6MB in the end (delta: 12.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 18:09:08,260 INFO L158 Benchmark]: TraceAbstraction took 10994.76ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 65.2MB in the end (delta: 21.0MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2025-03-16 18:09:08,260 INFO L158 Benchmark]: Witness Printer took 52.91ms. Allocated memory is still 142.6MB. Free memory was 65.2MB in the beginning and 59.9MB in the end (delta: 5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:09:08,261 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.12ms. Allocated memory is still 142.6MB. Free memory was 112.3MB in the beginning and 100.8MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.31ms. Allocated memory is still 142.6MB. Free memory was 100.8MB in the beginning and 99.8MB in the end (delta: 998.0kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.85ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 98.8MB in the end (delta: 997.0kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 213.50ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 86.6MB in the end (delta: 12.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10994.76ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 65.2MB in the end (delta: 21.0MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. * Witness Printer took 52.91ms. Allocated memory is still 142.6MB. Free memory was 65.2MB in the beginning and 59.9MB in the end (delta: 5.2MB). 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: 13]: 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, 29 locations, 53 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 106 mSDsluCounter, 1317 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 973 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 584 IncrementalHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 344 mSDtfsCounter, 584 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 703 GetRequests, 622 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=8, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 37 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 931 NumberOfCodeBlocks, 931 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 838 ConstructedInterpolants, 0 QuantifiedInterpolants, 2172 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1160 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 1127/1181 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: 35]: Location Invariant Derived location invariant: (((((((__int128) p * s) == (((__int128) q * r) + 1)) && (1 <= y)) && (y <= 5)) && (((((__int128) r * y) + b) + ((__int128) p * x)) == ((a + ((__int128) s * y)) + ((__int128) q * x)))) && ((((__int128) r * y) + ((__int128) p * x)) == a)) RESULT: Ultimate proved your program to be correct! [2025-03-16 18:09:08,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE