./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/prodbin-ll_valuebound50.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 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:07:50,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:07:50,080 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:07:50,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:07:50,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:07:50,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:07:50,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:07:50,104 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:07:50,104 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:07:50,105 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:07:50,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:07:50,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:07:50,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:07:50,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:07:50,106 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:07:50,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:07:50,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:07:50,106 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:07:50,107 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:07:50,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:07:50,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:07:50,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:07:50,108 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 -> 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 [2025-03-03 14:07:50,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:07:50,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:07:50,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:07:50,325 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:07:50,325 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:07:50,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2025-03-03 14:07:51,415 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9892a423/4fcacb0dd76e4b878aecdff59b19387b/FLAG00e0ca635 [2025-03-03 14:07:51,632 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:07:51,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2025-03-03 14:07:51,642 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9892a423/4fcacb0dd76e4b878aecdff59b19387b/FLAG00e0ca635 [2025-03-03 14:07:51,970 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9892a423/4fcacb0dd76e4b878aecdff59b19387b [2025-03-03 14:07:51,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:07:51,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:07:51,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:07:51,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:07:51,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:07:51,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:07:51" (1/1) ... [2025-03-03 14:07:51,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea9879e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:51, skipping insertion in model container [2025-03-03 14:07:51,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:07:51" (1/1) ... [2025-03-03 14:07:51,987 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:07:52,075 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/prodbin-ll_valuebound50.c[537,550] [2025-03-03 14:07:52,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:07:52,096 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:07:52,104 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/prodbin-ll_valuebound50.c[537,550] [2025-03-03 14:07:52,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:07:52,118 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:07:52,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52 WrapperNode [2025-03-03 14:07:52,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:07:52,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:07:52,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:07:52,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:07:52,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,141 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2025-03-03 14:07:52,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:07:52,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:07:52,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:07:52,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:07:52,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,162 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]. [2025-03-03 14:07:52,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,166 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:07:52,171 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:07:52,171 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:07:52,171 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:07:52,172 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (1/1) ... [2025-03-03 14:07:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:07:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:52,196 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) [2025-03-03 14:07:52,199 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 [2025-03-03 14:07:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:07:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 14:07:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 14:07:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:07:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:07:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:07:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 14:07:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 14:07:52,263 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:07:52,266 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:07:52,400 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 14:07:52,401 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:07:52,406 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:07:52,407 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:07:52,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:07:52 BoogieIcfgContainer [2025-03-03 14:07:52,407 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:07:52,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:07:52,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:07:52,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:07:52,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:07:51" (1/3) ... [2025-03-03 14:07:52,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bfed28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:07:52, skipping insertion in model container [2025-03-03 14:07:52,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:52" (2/3) ... [2025-03-03 14:07:52,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bfed28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:07:52, skipping insertion in model container [2025-03-03 14:07:52,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:07:52" (3/3) ... [2025-03-03 14:07:52,414 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2025-03-03 14:07:52,424 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:07:52,425 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_valuebound50.c that has 3 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-03 14:07:52,459 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:07:52,467 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;@753add8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:07:52,468 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:07:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:07:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:07:52,475 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:52,476 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:52,476 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:52,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash -603682929, now seen corresponding path program 1 times [2025-03-03 14:07:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138583786] [2025-03-03 14:07:52,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:52,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:07:52,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:07:52,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:52,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 14:07:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138583786] [2025-03-03 14:07:52,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138583786] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079268978] [2025-03-03 14:07:52,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:52,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:52,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:52,587 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) [2025-03-03 14:07:52,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:07:52,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:07:52,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:07:52,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:52,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:52,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 14:07:52,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 14:07:52,655 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 14:07:52,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079268978] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:52,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 14:07:52,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 14:07:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14726886] [2025-03-03 14:07:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:52,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 14:07:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:52,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 14:07:52,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 14:07:52,672 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:07:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:52,686 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-03-03 14:07:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 14:07:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2025-03-03 14:07:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:52,691 INFO L225 Difference]: With dead ends: 49 [2025-03-03 14:07:52,691 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 14:07:52,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 14:07:52,696 INFO L435 NwaCegarLoop]: 30 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, 30 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 [2025-03-03 14:07:52,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 14:07:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 14:07:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 14:07:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 14:07:52,721 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 23 [2025-03-03 14:07:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:52,722 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 14:07:52,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:07:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 14:07:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:07:52,723 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:52,723 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:52,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:07:52,924 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 [2025-03-03 14:07:52,924 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:52,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1252528, now seen corresponding path program 1 times [2025-03-03 14:07:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:52,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378774880] [2025-03-03 14:07:52,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:52,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:07:52,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:07:52,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:52,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995260088] [2025-03-03 14:07:52,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:52,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:52,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:52,952 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) [2025-03-03 14:07:52,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:07:52,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:07:52,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:07:52,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:52,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:52,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 14:07:52,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:07:53,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:07:53,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:53,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378774880] [2025-03-03 14:07:53,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:53,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995260088] [2025-03-03 14:07:53,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995260088] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:53,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 14:07:53,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2025-03-03 14:07:53,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694080058] [2025-03-03 14:07:53,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:53,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:07:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:53,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:07:53,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:07:53,253 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 14:07:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:53,308 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2025-03-03 14:07:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:07:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-03-03 14:07:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:53,310 INFO L225 Difference]: With dead ends: 32 [2025-03-03 14:07:53,310 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 14:07:53,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:07:53,311 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:53,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 14:07:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2025-03-03 14:07:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:07:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2025-03-03 14:07:53,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2025-03-03 14:07:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:53,317 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2025-03-03 14:07:53,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 14:07:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2025-03-03 14:07:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 14:07:53,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:53,318 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:53,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:07:53,520 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 [2025-03-03 14:07:53,520 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:53,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1696350775, now seen corresponding path program 1 times [2025-03-03 14:07:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035893570] [2025-03-03 14:07:53,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:53,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 14:07:53,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 14:07:53,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:53,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:07:53,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:53,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035893570] [2025-03-03 14:07:53,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035893570] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:53,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:07:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 14:07:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105397004] [2025-03-03 14:07:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:53,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 14:07:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:53,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 14:07:53,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 14:07:53,677 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 14:07:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:53,740 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2025-03-03 14:07:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:07:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-03 14:07:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:53,742 INFO L225 Difference]: With dead ends: 37 [2025-03-03 14:07:53,742 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 14:07:53,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 14:07:53,742 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:53,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:07:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 14:07:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-03-03 14:07:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:07:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2025-03-03 14:07:53,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 29 [2025-03-03 14:07:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:53,750 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2025-03-03 14:07:53,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 14:07:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2025-03-03 14:07:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-03 14:07:53,751 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:53,751 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:53,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 14:07:53,751 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:53,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1715132203, now seen corresponding path program 1 times [2025-03-03 14:07:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:53,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073635344] [2025-03-03 14:07:53,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:53,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-03 14:07:53,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 14:07:53,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:53,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:53,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534108069] [2025-03-03 14:07:53,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:53,779 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) [2025-03-03 14:07:53,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:07:53,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-03 14:07:53,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 14:07:53,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:53,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:53,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:07:53,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:07:54,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:07:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073635344] [2025-03-03 14:07:55,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534108069] [2025-03-03 14:07:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534108069] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:55,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:07:55,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2025-03-03 14:07:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875368410] [2025-03-03 14:07:55,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:55,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 14:07:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:55,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 14:07:55,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-03 14:07:55,596 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 14:07:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:56,822 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2025-03-03 14:07:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:07:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2025-03-03 14:07:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:56,824 INFO L225 Difference]: With dead ends: 43 [2025-03-03 14:07:56,824 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 14:07:56,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:07:56,825 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:56,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 185 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-03 14:07:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 14:07:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2025-03-03 14:07:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 14:07:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2025-03-03 14:07:56,834 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2025-03-03 14:07:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:56,834 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2025-03-03 14:07:56,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 14:07:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2025-03-03 14:07:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-03 14:07:56,836 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:56,836 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:56,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 14:07:57,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:57,041 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:57,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1686503052, now seen corresponding path program 1 times [2025-03-03 14:07:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993702834] [2025-03-03 14:07:57,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:57,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-03 14:07:57,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 14:07:57,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:57,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135121876] [2025-03-03 14:07:57,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:57,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:57,070 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) [2025-03-03 14:07:57,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:07:57,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-03 14:07:57,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 14:07:57,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:57,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:57,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:07:57,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:07:57,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:07:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993702834] [2025-03-03 14:07:57,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135121876] [2025-03-03 14:07:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135121876] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:57,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:07:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2025-03-03 14:07:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975756334] [2025-03-03 14:07:57,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:57,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:07:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:57,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:07:57,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:07:57,668 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 14:07:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:57,980 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2025-03-03 14:07:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:07:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2025-03-03 14:07:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:57,982 INFO L225 Difference]: With dead ends: 66 [2025-03-03 14:07:57,982 INFO L226 Difference]: Without dead ends: 59 [2025-03-03 14:07:57,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:07:57,983 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:57,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:07:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-03 14:07:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-03 14:07:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 14:07:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2025-03-03 14:07:57,993 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 31 [2025-03-03 14:07:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:57,995 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2025-03-03 14:07:57,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 14:07:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2025-03-03 14:07:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:07:57,997 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:57,997 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:58,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:58,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:58,202 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:58,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -514072932, now seen corresponding path program 1 times [2025-03-03 14:07:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787178287] [2025-03-03 14:07:58,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:58,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:07:58,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:07:58,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:58,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:58,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797722373] [2025-03-03 14:07:58,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:58,226 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) [2025-03-03 14:07:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:07:58,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:07:58,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:07:58,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:58,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:58,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:07:58,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:07:58,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:07:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:58,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787178287] [2025-03-03 14:07:58,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797722373] [2025-03-03 14:07:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797722373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:58,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:07:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2025-03-03 14:07:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813602062] [2025-03-03 14:07:58,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:58,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:07:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:58,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:07:58,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:07:58,379 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 14:07:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:58,451 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2025-03-03 14:07:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:07:58,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2025-03-03 14:07:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:58,452 INFO L225 Difference]: With dead ends: 65 [2025-03-03 14:07:58,452 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 14:07:58,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:07:58,453 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:58,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 134 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:07:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 14:07:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-03 14:07:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 14:07:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2025-03-03 14:07:58,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 37 [2025-03-03 14:07:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:58,467 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2025-03-03 14:07:58,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 14:07:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2025-03-03 14:07:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-03 14:07:58,468 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:58,468 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:58,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 14:07:58,668 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 [2025-03-03 14:07:58,669 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:58,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1695860034, now seen corresponding path program 1 times [2025-03-03 14:07:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163666986] [2025-03-03 14:07:58,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:58,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-03 14:07:58,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-03 14:07:58,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:58,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:58,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586841974] [2025-03-03 14:07:58,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:58,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:58,700 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) [2025-03-03 14:07:58,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:07:58,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-03 14:07:58,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-03 14:07:58,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:58,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:58,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 14:07:58,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:08:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:08:00,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:08:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 14:08:03,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:08:03,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163666986] [2025-03-03 14:08:03,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:08:03,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586841974] [2025-03-03 14:08:03,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586841974] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:08:03,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:08:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 27 [2025-03-03 14:08:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281505514] [2025-03-03 14:08:03,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:08:03,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:08:03,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:08:03,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:08:03,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:08:03,659 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-03 14:08:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:08:08,812 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2025-03-03 14:08:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:08:08,812 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 47 [2025-03-03 14:08:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:08:08,813 INFO L225 Difference]: With dead ends: 82 [2025-03-03 14:08:08,813 INFO L226 Difference]: Without dead ends: 80 [2025-03-03 14:08:08,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:08:08,815 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 14:08:08,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 14:08:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-03 14:08:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-03-03 14:08:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 14:08:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2025-03-03 14:08:08,828 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 47 [2025-03-03 14:08:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:08:08,829 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2025-03-03 14:08:08,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-03 14:08:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2025-03-03 14:08:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 14:08:08,830 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:08:08,830 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:08:08,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 14:08:09,034 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 [2025-03-03 14:08:09,034 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:08:09,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:08:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -4268767, now seen corresponding path program 2 times [2025-03-03 14:08:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:08:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634876440] [2025-03-03 14:08:09,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:08:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:08:09,039 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-03 14:08:09,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 14:08:09,075 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:08:09,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:08:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151993217] [2025-03-03 14:08:09,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:08:09,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:08:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:08:09,081 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) [2025-03-03 14:08:09,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:08:09,103 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-03 14:08:09,118 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 14:08:09,118 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:08:09,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:08:09,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 14:08:09,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:08:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 14:08:09,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:08:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-03 14:08:21,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:08:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634876440] [2025-03-03 14:08:21,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:08:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151993217] [2025-03-03 14:08:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151993217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:08:21,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:08:21,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 29 [2025-03-03 14:08:21,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23745857] [2025-03-03 14:08:21,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:08:21,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:08:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:08:21,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:08:21,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:08:21,063 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:08:39,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 14:08:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:08:40,674 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2025-03-03 14:08:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 14:08:40,675 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 55 [2025-03-03 14:08:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:08:40,676 INFO L225 Difference]: With dead ends: 120 [2025-03-03 14:08:40,676 INFO L226 Difference]: Without dead ends: 118 [2025-03-03 14:08:40,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:08:40,677 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2025-03-03 14:08:40,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 166 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 534 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2025-03-03 14:08:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-03 14:08:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-03 14:08:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 89 states have internal predecessors, (101), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 19 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 14:08:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2025-03-03 14:08:40,692 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 55 [2025-03-03 14:08:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:08:40,692 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2025-03-03 14:08:40,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:08:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2025-03-03 14:08:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-03 14:08:40,694 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:08:40,694 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:08:40,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 14:08:40,894 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 [2025-03-03 14:08:40,894 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:08:40,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:08:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash 620023781, now seen corresponding path program 3 times [2025-03-03 14:08:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:08:40,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352890318] [2025-03-03 14:08:40,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:08:40,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:08:40,899 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 63 statements into 6 equivalence classes. [2025-03-03 14:08:40,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 63 of 63 statements. [2025-03-03 14:08:40,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 14:08:40,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:08:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961623659] [2025-03-03 14:08:40,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:08:40,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:08:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:08:40,943 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) [2025-03-03 14:08:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:08:40,981 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 63 statements into 6 equivalence classes. [2025-03-03 14:08:41,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 63 of 63 statements. [2025-03-03 14:08:41,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 14:08:41,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:08:41,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 14:08:41,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:08:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 14:08:42,196 INFO L312 TraceCheckSpWp]: Computing backward predicates...