./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i --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/array-examples/sorting_bubblesort_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 08:58:54,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 08:58:54,291 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 08:58:54,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 08:58:54,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 08:58:54,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 08:58:54,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 08:58:54,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 08:58:54,312 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 08:58:54,312 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 08:58:54,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 08:58:54,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 08:58:54,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 08:58:54,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 08:58:54,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 08:58:54,314 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 08:58:54,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 08:58:54,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 08:58:54,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 08:58:54,315 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 -> 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 [2025-03-03 08:58:54,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 08:58:54,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 08:58:54,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 08:58:54,559 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 08:58:54,559 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 08:58:54,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2025-03-03 08:58:55,718 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b049095/aefd8e78ac4347a0841f52c240eb1886/FLAGb9165479d [2025-03-03 08:58:55,954 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 08:58:55,955 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2025-03-03 08:58:55,974 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b049095/aefd8e78ac4347a0841f52c240eb1886/FLAGb9165479d [2025-03-03 08:58:55,990 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b049095/aefd8e78ac4347a0841f52c240eb1886 [2025-03-03 08:58:55,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 08:58:55,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 08:58:55,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 08:58:55,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 08:58:55,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 08:58:55,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 08:58:55" (1/1) ... [2025-03-03 08:58:56,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a5ace6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 08:58:55" (1/1) ... [2025-03-03 08:58:56,011 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 08:58:56,115 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2025-03-03 08:58:56,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 08:58:56,141 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 08:58:56,149 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2025-03-03 08:58:56,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 08:58:56,168 INFO L204 MainTranslator]: Completed translation [2025-03-03 08:58:56,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56 WrapperNode [2025-03-03 08:58:56,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 08:58:56,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 08:58:56,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 08:58:56,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 08:58:56,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,191 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2025-03-03 08:58:56,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 08:58:56,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 08:58:56,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 08:58:56,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 08:58:56,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,213 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-03 08:58:56,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,218 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 08:58:56,222 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 08:58:56,223 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 08:58:56,223 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 08:58:56,223 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 08:58:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:56,251 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 08:58:56,253 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 08:58:56,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 08:58:56,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 08:58:56,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 08:58:56,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 08:58:56,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 08:58:56,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 08:58:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 08:58:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 08:58:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 08:58:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 08:58:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 08:58:56,330 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 08:58:56,332 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 08:58:56,440 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 08:58:56,444 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-03 08:58:56,444 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 08:58:56,450 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 08:58:56,450 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 08:58:56,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 08:58:56 BoogieIcfgContainer [2025-03-03 08:58:56,451 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 08:58:56,453 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 08:58:56,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 08:58:56,456 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 08:58:56,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 08:58:55" (1/3) ... [2025-03-03 08:58:56,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c130e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (2/3) ... [2025-03-03 08:58:56,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c130e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 08:58:56" (3/3) ... [2025-03-03 08:58:56,458 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2025-03-03 08:58:56,468 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 08:58:56,469 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_bubblesort_ground-2.i that has 1 procedures, 16 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-03 08:58:56,505 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 08:58:56,515 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;@4f17c503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 08:58:56,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 08:58:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 08:58:56,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:56,524 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:56,524 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:56,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -107250953, now seen corresponding path program 1 times [2025-03-03 08:58:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:56,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887192140] [2025-03-03 08:58:56,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:56,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:56,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 08:58:56,600 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 08:58:56,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:56,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:56,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:56,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887192140] [2025-03-03 08:58:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887192140] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:56,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 08:58:56,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 08:58:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336492252] [2025-03-03 08:58:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:56,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:56,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:56,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:56,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 08:58:56,695 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:56,710 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2025-03-03 08:58:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 08:58:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:56,716 INFO L225 Difference]: With dead ends: 30 [2025-03-03 08:58:56,716 INFO L226 Difference]: Without dead ends: 14 [2025-03-03 08:58:56,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 08:58:56,719 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:56,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-03 08:58:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-03 08:58:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2025-03-03 08:58:56,741 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2025-03-03 08:58:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:56,742 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2025-03-03 08:58:56,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2025-03-03 08:58:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-03 08:58:56,743 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:56,743 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:56,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 08:58:56,743 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:56,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2059050763, now seen corresponding path program 1 times [2025-03-03 08:58:56,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:56,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502746669] [2025-03-03 08:58:56,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:56,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:56,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-03 08:58:56,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-03 08:58:56,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:56,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502746669] [2025-03-03 08:58:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502746669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317540209] [2025-03-03 08:58:56,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:56,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:56,842 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 08:58:56,843 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 08:58:56,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-03 08:58:56,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-03 08:58:56,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:56,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:56,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 08:58:56,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:56,912 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 08:58:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317540209] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:56,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 08:58:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 08:58:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450089466] [2025-03-03 08:58:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:56,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:56,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:56,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:56,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:56,916 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:56,929 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2025-03-03 08:58:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-03 08:58:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:56,931 INFO L225 Difference]: With dead ends: 24 [2025-03-03 08:58:56,932 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 08:58:56,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:56,933 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:56,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 08:58:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-03 08:58:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2025-03-03 08:58:56,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 9 [2025-03-03 08:58:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:56,937 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2025-03-03 08:58:56,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2025-03-03 08:58:56,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 08:58:56,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:56,938 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:56,944 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 08:58:57,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,139 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -142887568, now seen corresponding path program 1 times [2025-03-03 08:58:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768344445] [2025-03-03 08:58:57,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 08:58:57,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 08:58:57,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768344445] [2025-03-03 08:58:57,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768344445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036700193] [2025-03-03 08:58:57,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,201 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 08:58:57,203 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 08:58:57,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 08:58:57,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 08:58:57,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 08:58:57,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:57,250 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 08:58:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036700193] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:57,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 08:58:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 08:58:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365592666] [2025-03-03 08:58:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:57,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:57,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:57,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,251 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:57,268 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2025-03-03 08:58:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-03 08:58:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:57,270 INFO L225 Difference]: With dead ends: 36 [2025-03-03 08:58:57,270 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 08:58:57,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,271 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:57,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 08:58:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2025-03-03 08:58:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2025-03-03 08:58:57,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2025-03-03 08:58:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:57,277 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2025-03-03 08:58:57,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2025-03-03 08:58:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 08:58:57,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:57,278 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:57,284 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 08:58:57,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 08:58:57,479 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2042697145, now seen corresponding path program 1 times [2025-03-03 08:58:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829990764] [2025-03-03 08:58:57,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,489 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 08:58:57,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829990764] [2025-03-03 08:58:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829990764] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952816370] [2025-03-03 08:58:57,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,551 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 08:58:57,552 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 08:58:57,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 08:58:57,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 08:58:57,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 08:58:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952816370] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:57,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 08:58:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621791852] [2025-03-03 08:58:57,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:57,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 08:58:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:57,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 08:58:57,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 08:58:57,641 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:57,659 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2025-03-03 08:58:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 08:58:57,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-03 08:58:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:57,660 INFO L225 Difference]: With dead ends: 37 [2025-03-03 08:58:57,661 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 08:58:57,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 08:58:57,662 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:57,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 08:58:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 08:58:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2025-03-03 08:58:57,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 14 [2025-03-03 08:58:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:57,665 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2025-03-03 08:58:57,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2025-03-03 08:58:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 08:58:57,665 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:57,665 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:57,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 08:58:57,870 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 08:58:57,870 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1494382515, now seen corresponding path program 2 times [2025-03-03 08:58:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767703351] [2025-03-03 08:58:57,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:57,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 08:58:57,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 08:58:57,894 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:58:57,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 08:58:57,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767703351] [2025-03-03 08:58:57,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767703351] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938542520] [2025-03-03 08:58:57,935 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:57,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,938 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 08:58:57,953 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 08:58:57,988 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 08:58:58,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 08:58:58,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:58:58,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 08:58:58,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 08:58:58,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 08:58:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938542520] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:58,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:58,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2025-03-03 08:58:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907999923] [2025-03-03 08:58:58,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 08:58:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 08:58:58,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 08:58:58,116 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,152 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2025-03-03 08:58:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 08:58:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-03 08:58:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,153 INFO L225 Difference]: With dead ends: 52 [2025-03-03 08:58:58,153 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 08:58:58,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 08:58:58,154 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 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 08:58:58,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 08:58:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2025-03-03 08:58:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2025-03-03 08:58:58,161 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2025-03-03 08:58:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,161 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2025-03-03 08:58:58,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2025-03-03 08:58:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-03 08:58:58,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,162 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,173 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 08:58:58,362 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 08:58:58,363 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1285758660, now seen corresponding path program 3 times [2025-03-03 08:58:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543037305] [2025-03-03 08:58:58,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:58:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-03-03 08:58:58,398 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 22 of 26 statements. [2025-03-03 08:58:58,398 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 08:58:58,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543037305] [2025-03-03 08:58:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543037305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282107441] [2025-03-03 08:58:58,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:58:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:58,449 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 08:58:58,451 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 08:58:58,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-03-03 08:58:58,506 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 22 of 26 statements. [2025-03-03 08:58:58,507 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 08:58:58,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 08:58:58,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:58,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282107441] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:58,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:58,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-03 08:58:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039564323] [2025-03-03 08:58:58,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 08:58:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 08:58:58,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-03 08:58:58,555 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,589 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2025-03-03 08:58:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 08:58:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-03 08:58:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,590 INFO L225 Difference]: With dead ends: 77 [2025-03-03 08:58:58,590 INFO L226 Difference]: Without dead ends: 57 [2025-03-03 08:58:58,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-03 08:58:58,590 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:58,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-03 08:58:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2025-03-03 08:58:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2025-03-03 08:58:58,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 26 [2025-03-03 08:58:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,600 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2025-03-03 08:58:58,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2025-03-03 08:58:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 08:58:58,601 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,602 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 08:58:58,802 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 08:58:58,802 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 455009788, now seen corresponding path program 4 times [2025-03-03 08:58:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078675620] [2025-03-03 08:58:58,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 08:58:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,812 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-03 08:58:58,822 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 08:58:58,823 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 08:58:58,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078675620] [2025-03-03 08:58:58,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078675620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081647430] [2025-03-03 08:58:58,942 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 08:58:58,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:58,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:58,944 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 08:58:58,945 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 08:58:59,007 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-03 08:58:59,028 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 08:58:59,028 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 08:58:59,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 08:58:59,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:59,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081647430] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:59,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:59,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-03 08:58:59,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540678239] [2025-03-03 08:58:59,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:59,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 08:58:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:59,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 08:58:59,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-03 08:58:59,149 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:59,225 INFO L93 Difference]: Finished difference Result 149 states and 212 transitions. [2025-03-03 08:58:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 08:58:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-03 08:58:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:59,227 INFO L225 Difference]: With dead ends: 149 [2025-03-03 08:58:59,227 INFO L226 Difference]: Without dead ends: 105 [2025-03-03 08:58:59,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-03 08:58:59,228 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:59,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:58:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-03 08:58:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-03-03 08:58:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3173076923076923) internal successors, (137), 104 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2025-03-03 08:58:59,240 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 38 [2025-03-03 08:58:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:59,240 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2025-03-03 08:58:59,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2025-03-03 08:58:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 08:58:59,242 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:59,242 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:59,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 08:58:59,442 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 08:58:59,443 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:59,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2056286340, now seen corresponding path program 5 times [2025-03-03 08:58:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:59,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439224032] [2025-03-03 08:58:59,443 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 08:58:59,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:59,462 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 16 equivalence classes. [2025-03-03 08:58:59,530 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 54 of 62 statements. [2025-03-03 08:58:59,530 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 08:58:59,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439224032] [2025-03-03 08:58:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439224032] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483111248] [2025-03-03 08:58:59,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 08:58:59,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:59,767 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 08:58:59,768 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 08:58:59,809 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 16 equivalence classes. [2025-03-03 08:58:59,917 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 54 of 62 statements. [2025-03-03 08:58:59,918 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 08:58:59,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 08:58:59,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:58:59,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:59:00,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483111248] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:00,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:00,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-03 08:59:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091533687] [2025-03-03 08:59:00,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:00,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 08:59:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:00,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 08:59:00,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-03 08:59:00,301 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:00,425 INFO L93 Difference]: Finished difference Result 293 states and 420 transitions. [2025-03-03 08:59:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 08:59:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2025-03-03 08:59:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:00,427 INFO L225 Difference]: With dead ends: 293 [2025-03-03 08:59:00,427 INFO L226 Difference]: Without dead ends: 201 [2025-03-03 08:59:00,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-03 08:59:00,428 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:00,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 88 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:59:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-03-03 08:59:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2025-03-03 08:59:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.325) internal successors, (265), 200 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 265 transitions. [2025-03-03 08:59:00,449 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 265 transitions. Word has length 62 [2025-03-03 08:59:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:00,449 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 265 transitions. [2025-03-03 08:59:00,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 265 transitions. [2025-03-03 08:59:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-03 08:59:00,453 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:00,453 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:00,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 08:59:00,654 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 08:59:00,654 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:00,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:00,655 INFO L85 PathProgramCache]: Analyzing trace with hash 545481340, now seen corresponding path program 6 times [2025-03-03 08:59:00,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:00,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067231292] [2025-03-03 08:59:00,655 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 08:59:00,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:00,670 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 110 statements into 32 equivalence classes. [2025-03-03 08:59:00,717 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 47 of 110 statements. [2025-03-03 08:59:00,719 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 08:59:00,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:00,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067231292] [2025-03-03 08:59:00,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067231292] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498598151] [2025-03-03 08:59:00,871 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 08:59:00,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:00,873 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 08:59:00,875 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 08:59:00,921 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 110 statements into 32 equivalence classes. [2025-03-03 08:59:00,989 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 47 of 110 statements. [2025-03-03 08:59:00,989 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 08:59:00,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:00,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 08:59:00,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:01,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498598151] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:01,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 08:59:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721000403] [2025-03-03 08:59:01,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:01,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 08:59:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:01,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 08:59:01,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 08:59:01,192 INFO L87 Difference]: Start difference. First operand 201 states and 265 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:01,215 INFO L93 Difference]: Finished difference Result 401 states and 540 transitions. [2025-03-03 08:59:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 08:59:01,216 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2025-03-03 08:59:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:01,217 INFO L225 Difference]: With dead ends: 401 [2025-03-03 08:59:01,217 INFO L226 Difference]: Without dead ends: 213 [2025-03-03 08:59:01,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 08:59:01,218 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:01,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:59:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2025-03-03 08:59:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2025-03-03 08:59:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.3066037735849056) internal successors, (277), 212 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 277 transitions. [2025-03-03 08:59:01,226 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 277 transitions. Word has length 110 [2025-03-03 08:59:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:01,226 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 277 transitions. [2025-03-03 08:59:01,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 277 transitions. [2025-03-03 08:59:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-03-03 08:59:01,231 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:01,232 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:01,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 08:59:01,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-03 08:59:01,433 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:01,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1333252476, now seen corresponding path program 7 times [2025-03-03 08:59:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233518790] [2025-03-03 08:59:01,433 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 08:59:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:01,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-03-03 08:59:01,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-03-03 08:59:01,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:59:01,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:02,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:02,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233518790] [2025-03-03 08:59:02,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233518790] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:02,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743622169] [2025-03-03 08:59:02,007 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 08:59:02,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:02,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 08:59:02,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 08:59:02,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-03-03 08:59:02,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-03-03 08:59:02,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:59:02,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:02,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 08:59:02,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:02,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743622169] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:02,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:02,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-03 08:59:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306077385] [2025-03-03 08:59:02,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:02,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 08:59:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:02,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 08:59:02,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 08:59:02,741 INFO L87 Difference]: Start difference. First operand 213 states and 277 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:02,785 INFO L93 Difference]: Finished difference Result 425 states and 576 transitions. [2025-03-03 08:59:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 08:59:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2025-03-03 08:59:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:02,786 INFO L225 Difference]: With dead ends: 425 [2025-03-03 08:59:02,786 INFO L226 Difference]: Without dead ends: 237 [2025-03-03 08:59:02,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 08:59:02,788 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:02,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:59:02,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2025-03-03 08:59:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2025-03-03 08:59:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.2754237288135593) internal successors, (301), 236 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 301 transitions. [2025-03-03 08:59:02,806 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 301 transitions. Word has length 122 [2025-03-03 08:59:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:02,806 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 301 transitions. [2025-03-03 08:59:02,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 301 transitions. [2025-03-03 08:59:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 08:59:02,807 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:02,807 INFO L218 NwaCegarLoop]: trace histogram [46, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:02,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 08:59:03,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 08:59:03,008 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:03,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 76885884, now seen corresponding path program 8 times [2025-03-03 08:59:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:03,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568761124] [2025-03-03 08:59:03,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:59:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:03,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 146 statements into 2 equivalence classes. [2025-03-03 08:59:03,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 08:59:03,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:59:03,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:04,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568761124] [2025-03-03 08:59:04,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568761124] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473555675] [2025-03-03 08:59:04,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:59:04,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:04,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:04,512 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 08:59:04,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 08:59:04,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 146 statements into 2 equivalence classes. [2025-03-03 08:59:04,655 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 08:59:04,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:59:04,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:04,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 08:59:04,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:04,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2025-03-03 08:59:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473555675] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:06,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2025-03-03 08:59:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788446371] [2025-03-03 08:59:06,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:06,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-03-03 08:59:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:06,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-03-03 08:59:06,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-03-03 08:59:06,613 INFO L87 Difference]: Start difference. First operand 237 states and 301 transitions. Second operand has 97 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 97 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:06,706 INFO L93 Difference]: Finished difference Result 473 states and 648 transitions. [2025-03-03 08:59:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-03 08:59:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 97 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2025-03-03 08:59:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:06,707 INFO L225 Difference]: With dead ends: 473 [2025-03-03 08:59:06,707 INFO L226 Difference]: Without dead ends: 285 [2025-03-03 08:59:06,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-03-03 08:59:06,710 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:06,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:59:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2025-03-03 08:59:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2025-03-03 08:59:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 284 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 349 transitions. [2025-03-03 08:59:06,717 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 349 transitions. Word has length 146 [2025-03-03 08:59:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:06,717 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 349 transitions. [2025-03-03 08:59:06,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 97 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:59:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 349 transitions. [2025-03-03 08:59:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2025-03-03 08:59:06,718 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:06,718 INFO L218 NwaCegarLoop]: trace histogram [94, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:06,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 08:59:06,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-03 08:59:06,919 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:06,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -593368196, now seen corresponding path program 9 times [2025-03-03 08:59:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465923451] [2025-03-03 08:59:06,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:59:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:06,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 194 statements into 48 equivalence classes. [2025-03-03 08:59:07,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 162 of 194 statements. [2025-03-03 08:59:07,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-03 08:59:07,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5801 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-03-03 08:59:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465923451] [2025-03-03 08:59:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465923451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723191512] [2025-03-03 08:59:08,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:59:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:08,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 08:59:08,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 08:59:08,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 194 statements into 48 equivalence classes.