./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.13.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b2c6a3c4af8091017033117c21d8fbc40cee2009788b890a114045d77587077 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 19:03:25,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 19:03:25,744 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 19:03:25,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 19:03:25,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 19:03:25,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 19:03:25,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 19:03:25,767 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 19:03:25,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 19:03:25,767 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 19:03:25,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 19:03:25,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 19:03:25,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 19:03:25,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 19:03:25,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 19:03:25,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 19:03:25,770 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 19:03:25,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 19:03:25,771 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 19:03:25,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 19:03:25,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 19:03:25,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 19:03:25,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 19:03:25,772 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 -> 1b2c6a3c4af8091017033117c21d8fbc40cee2009788b890a114045d77587077 [2025-03-16 19:03:25,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 19:03:26,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 19:03:26,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 19:03:26,006 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 19:03:26,006 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 19:03:26,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2025-03-16 19:03:27,103 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc7b6fdb/89ef9ec188304425a92579e2f06dc9c9/FLAGd8dc90897 [2025-03-16 19:03:27,386 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 19:03:27,387 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2025-03-16 19:03:27,401 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc7b6fdb/89ef9ec188304425a92579e2f06dc9c9/FLAGd8dc90897 [2025-03-16 19:03:27,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc7b6fdb/89ef9ec188304425a92579e2f06dc9c9 [2025-03-16 19:03:27,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 19:03:27,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 19:03:27,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 19:03:27,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 19:03:27,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 19:03:27,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 07:03:27" (1/1) ... [2025-03-16 19:03:27,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7382e96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:27, skipping insertion in model container [2025-03-16 19:03:27,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 07:03:27" (1/1) ... [2025-03-16 19:03:27,711 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 19:03:27,806 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/systemc/token_ring.13.cil-1.c[671,684] [2025-03-16 19:03:27,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 19:03:27,913 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 19:03:27,922 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/systemc/token_ring.13.cil-1.c[671,684] [2025-03-16 19:03:27,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 19:03:28,002 INFO L204 MainTranslator]: Completed translation [2025-03-16 19:03:28,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28 WrapperNode [2025-03-16 19:03:28,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 19:03:28,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 19:03:28,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 19:03:28,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 19:03:28,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,061 INFO L138 Inliner]: procedures = 54, calls = 71, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 897 [2025-03-16 19:03:28,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 19:03:28,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 19:03:28,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 19:03:28,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 19:03:28,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,083 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,099 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 19:03:28,100 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,100 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,111 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 19:03:28,125 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 19:03:28,126 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 19:03:28,126 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 19:03:28,126 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (1/1) ... [2025-03-16 19:03:28,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 19:03:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 19:03:28,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 19:03:28,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 19:03:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 19:03:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2025-03-16 19:03:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2025-03-16 19:03:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2025-03-16 19:03:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2025-03-16 19:03:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2025-03-16 19:03:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2025-03-16 19:03:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure error [2025-03-16 19:03:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2025-03-16 19:03:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2025-03-16 19:03:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2025-03-16 19:03:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2025-03-16 19:03:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2025-03-16 19:03:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2025-03-16 19:03:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2025-03-16 19:03:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 19:03:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 19:03:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 19:03:28,283 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 19:03:28,285 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 19:03:28,979 INFO L? ?]: Removed 91 outVars from TransFormulas that were not future-live. [2025-03-16 19:03:28,979 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 19:03:28,999 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 19:03:28,999 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 19:03:28,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 07:03:28 BoogieIcfgContainer [2025-03-16 19:03:28,999 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 19:03:29,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 19:03:29,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 19:03:29,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 19:03:29,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 07:03:27" (1/3) ... [2025-03-16 19:03:29,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ce44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 07:03:29, skipping insertion in model container [2025-03-16 19:03:29,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 07:03:28" (2/3) ... [2025-03-16 19:03:29,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ce44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 07:03:29, skipping insertion in model container [2025-03-16 19:03:29,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 07:03:28" (3/3) ... [2025-03-16 19:03:29,012 INFO L128 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-1.c [2025-03-16 19:03:29,023 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 19:03:29,026 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG token_ring.13.cil-1.c that has 8 procedures, 394 locations, 1 initial locations, 16 loop locations, and 1 error locations. [2025-03-16 19:03:29,074 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 19:03:29,085 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;@402575dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 19:03:29,086 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 19:03:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 394 states, 357 states have (on average 1.6610644257703082) internal successors, (593), 360 states have internal predecessors, (593), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2025-03-16 19:03:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:29,099 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:29,100 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:29,100 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:29,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1768806494, now seen corresponding path program 1 times [2025-03-16 19:03:29,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:29,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754009533] [2025-03-16 19:03:29,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:29,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:29,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:29,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:29,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:29,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754009533] [2025-03-16 19:03:29,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754009533] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:29,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:29,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 19:03:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572946887] [2025-03-16 19:03:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:29,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 19:03:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:29,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 19:03:29,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 19:03:29,641 INFO L87 Difference]: Start difference. First operand has 394 states, 357 states have (on average 1.6610644257703082) internal successors, (593), 360 states have internal predecessors, (593), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:30,300 INFO L93 Difference]: Finished difference Result 1193 states and 1988 transitions. [2025-03-16 19:03:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 19:03:30,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:30,317 INFO L225 Difference]: With dead ends: 1193 [2025-03-16 19:03:30,318 INFO L226 Difference]: Without dead ends: 812 [2025-03-16 19:03:30,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:30,325 INFO L435 NwaCegarLoop]: 504 mSDtfsCounter, 1209 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:30,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1794 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2025-03-16 19:03:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 779. [2025-03-16 19:03:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 714 states have (on average 1.6274509803921569) internal successors, (1162), 717 states have internal predecessors, (1162), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2025-03-16 19:03:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1263 transitions. [2025-03-16 19:03:30,433 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1263 transitions. Word has length 171 [2025-03-16 19:03:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:30,433 INFO L471 AbstractCegarLoop]: Abstraction has 779 states and 1263 transitions. [2025-03-16 19:03:30,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1263 transitions. [2025-03-16 19:03:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:30,439 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:30,439 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:30,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 19:03:30,440 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:30,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2023608164, now seen corresponding path program 1 times [2025-03-16 19:03:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:30,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786027773] [2025-03-16 19:03:30,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:30,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:30,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:30,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:30,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:30,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786027773] [2025-03-16 19:03:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786027773] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:30,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910388554] [2025-03-16 19:03:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:30,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:30,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:30,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:30,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:30,658 INFO L87 Difference]: Start difference. First operand 779 states and 1263 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:31,374 INFO L93 Difference]: Finished difference Result 2045 states and 3348 transitions. [2025-03-16 19:03:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:31,381 INFO L225 Difference]: With dead ends: 2045 [2025-03-16 19:03:31,384 INFO L226 Difference]: Without dead ends: 1285 [2025-03-16 19:03:31,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:31,386 INFO L435 NwaCegarLoop]: 847 mSDtfsCounter, 1217 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:31,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 3448 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2025-03-16 19:03:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1140. [2025-03-16 19:03:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1046 states have (on average 1.6195028680688337) internal successors, (1694), 1050 states have internal predecessors, (1694), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (75), 72 states have call predecessors, (75), 71 states have call successors, (75) [2025-03-16 19:03:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1842 transitions. [2025-03-16 19:03:31,435 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1842 transitions. Word has length 171 [2025-03-16 19:03:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:31,436 INFO L471 AbstractCegarLoop]: Abstraction has 1140 states and 1842 transitions. [2025-03-16 19:03:31,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1842 transitions. [2025-03-16 19:03:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:31,440 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:31,440 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:31,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 19:03:31,440 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:31,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1830676963, now seen corresponding path program 1 times [2025-03-16 19:03:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:31,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759443231] [2025-03-16 19:03:31,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:31,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:31,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:31,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:31,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:31,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:31,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759443231] [2025-03-16 19:03:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759443231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:31,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:31,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771843870] [2025-03-16 19:03:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:31,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:31,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:31,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:31,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:31,630 INFO L87 Difference]: Start difference. First operand 1140 states and 1842 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:32,356 INFO L93 Difference]: Finished difference Result 3204 states and 5236 transitions. [2025-03-16 19:03:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:32,368 INFO L225 Difference]: With dead ends: 3204 [2025-03-16 19:03:32,368 INFO L226 Difference]: Without dead ends: 2083 [2025-03-16 19:03:32,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:32,376 INFO L435 NwaCegarLoop]: 843 mSDtfsCounter, 1212 mSDsluCounter, 2589 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:32,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3432 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2025-03-16 19:03:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1915. [2025-03-16 19:03:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1761 states have (on average 1.622373651334469) internal successors, (2857), 1769 states have internal predecessors, (2857), 117 states have call successors, (117), 31 states have call predecessors, (117), 36 states have return successors, (131), 118 states have call predecessors, (131), 115 states have call successors, (131) [2025-03-16 19:03:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 3105 transitions. [2025-03-16 19:03:32,451 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 3105 transitions. Word has length 171 [2025-03-16 19:03:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:32,452 INFO L471 AbstractCegarLoop]: Abstraction has 1915 states and 3105 transitions. [2025-03-16 19:03:32,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 3105 transitions. [2025-03-16 19:03:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:32,454 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:32,454 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:32,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 19:03:32,454 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:32,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1963000708, now seen corresponding path program 1 times [2025-03-16 19:03:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:32,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380138858] [2025-03-16 19:03:32,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:32,466 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:32,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:32,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:32,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:32,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380138858] [2025-03-16 19:03:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380138858] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:32,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898281016] [2025-03-16 19:03:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:32,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:32,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:32,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:32,640 INFO L87 Difference]: Start difference. First operand 1915 states and 3105 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:33,388 INFO L93 Difference]: Finished difference Result 5713 states and 9397 transitions. [2025-03-16 19:03:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:33,405 INFO L225 Difference]: With dead ends: 5713 [2025-03-16 19:03:33,405 INFO L226 Difference]: Without dead ends: 3817 [2025-03-16 19:03:33,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:33,411 INFO L435 NwaCegarLoop]: 836 mSDtfsCounter, 1204 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:33,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 3406 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2025-03-16 19:03:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3609. [2025-03-16 19:03:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3329 states have (on average 1.6374286572544308) internal successors, (5451), 3351 states have internal predecessors, (5451), 205 states have call successors, (205), 55 states have call predecessors, (205), 74 states have return successors, (267), 210 states have call predecessors, (267), 203 states have call successors, (267) [2025-03-16 19:03:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5923 transitions. [2025-03-16 19:03:33,545 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5923 transitions. Word has length 171 [2025-03-16 19:03:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:33,545 INFO L471 AbstractCegarLoop]: Abstraction has 3609 states and 5923 transitions. [2025-03-16 19:03:33,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5923 transitions. [2025-03-16 19:03:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:33,547 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:33,548 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:33,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 19:03:33,548 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:33,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1670377115, now seen corresponding path program 1 times [2025-03-16 19:03:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189212600] [2025-03-16 19:03:33,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:33,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:33,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:33,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:33,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:33,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189212600] [2025-03-16 19:03:33,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189212600] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:33,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:33,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345815704] [2025-03-16 19:03:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:33,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:33,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:33,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:33,679 INFO L87 Difference]: Start difference. First operand 3609 states and 5923 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:34,531 INFO L93 Difference]: Finished difference Result 11307 states and 18913 transitions. [2025-03-16 19:03:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:34,569 INFO L225 Difference]: With dead ends: 11307 [2025-03-16 19:03:34,569 INFO L226 Difference]: Without dead ends: 7717 [2025-03-16 19:03:34,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:34,582 INFO L435 NwaCegarLoop]: 833 mSDtfsCounter, 1199 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:34,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 3394 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7717 states. [2025-03-16 19:03:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7717 to 7420. [2025-03-16 19:03:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7420 states, 6870 states have (on average 1.6633187772925764) internal successors, (11427), 6938 states have internal predecessors, (11427), 381 states have call successors, (381), 103 states have call predecessors, (381), 168 states have return successors, (635), 394 states have call predecessors, (635), 379 states have call successors, (635) [2025-03-16 19:03:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7420 states to 7420 states and 12443 transitions. [2025-03-16 19:03:34,879 INFO L78 Accepts]: Start accepts. Automaton has 7420 states and 12443 transitions. Word has length 171 [2025-03-16 19:03:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:34,879 INFO L471 AbstractCegarLoop]: Abstraction has 7420 states and 12443 transitions. [2025-03-16 19:03:34,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7420 states and 12443 transitions. [2025-03-16 19:03:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:34,884 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:34,884 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:34,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 19:03:34,884 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:34,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1676100452, now seen corresponding path program 1 times [2025-03-16 19:03:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136206308] [2025-03-16 19:03:34,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:34,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:34,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:34,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:34,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136206308] [2025-03-16 19:03:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136206308] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809290301] [2025-03-16 19:03:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:35,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:35,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:35,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:35,004 INFO L87 Difference]: Start difference. First operand 7420 states and 12443 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:35,910 INFO L93 Difference]: Finished difference Result 24128 states and 41463 transitions. [2025-03-16 19:03:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:36,016 INFO L225 Difference]: With dead ends: 24128 [2025-03-16 19:03:36,017 INFO L226 Difference]: Without dead ends: 16727 [2025-03-16 19:03:36,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:36,039 INFO L435 NwaCegarLoop]: 830 mSDtfsCounter, 1194 mSDsluCounter, 2552 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:36,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 3382 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16727 states. [2025-03-16 19:03:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16727 to 16257. [2025-03-16 19:03:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16257 states, 15113 states have (on average 1.6964864686031893) internal successors, (25639), 15327 states have internal predecessors, (25639), 733 states have call successors, (733), 199 states have call predecessors, (733), 410 states have return successors, (1755), 762 states have call predecessors, (1755), 731 states have call successors, (1755) [2025-03-16 19:03:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16257 states to 16257 states and 28127 transitions. [2025-03-16 19:03:36,607 INFO L78 Accepts]: Start accepts. Automaton has 16257 states and 28127 transitions. Word has length 171 [2025-03-16 19:03:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:36,608 INFO L471 AbstractCegarLoop]: Abstraction has 16257 states and 28127 transitions. [2025-03-16 19:03:36,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16257 states and 28127 transitions. [2025-03-16 19:03:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:36,617 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:36,617 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:36,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-16 19:03:36,617 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:36,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1506956677, now seen corresponding path program 1 times [2025-03-16 19:03:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:36,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371044222] [2025-03-16 19:03:36,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:36,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:36,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:36,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:36,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:36,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371044222] [2025-03-16 19:03:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371044222] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:36,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:36,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:36,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47940086] [2025-03-16 19:03:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:36,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:36,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:36,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:36,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:36,749 INFO L87 Difference]: Start difference. First operand 16257 states and 28127 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:38,066 INFO L93 Difference]: Finished difference Result 54455 states and 97181 transitions. [2025-03-16 19:03:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:38,245 INFO L225 Difference]: With dead ends: 54455 [2025-03-16 19:03:38,245 INFO L226 Difference]: Without dead ends: 38217 [2025-03-16 19:03:38,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:38,314 INFO L435 NwaCegarLoop]: 827 mSDtfsCounter, 1189 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 3370 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:38,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 3370 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 19:03:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38217 states. [2025-03-16 19:03:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38217 to 37414. [2025-03-16 19:03:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37414 states, 34920 states have (on average 1.7333046964490264) internal successors, (60527), 35588 states have internal predecessors, (60527), 1437 states have call successors, (1437), 391 states have call predecessors, (1437), 1056 states have return successors, (5531), 1498 states have call predecessors, (5531), 1435 states have call successors, (5531) [2025-03-16 19:03:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37414 states to 37414 states and 67495 transitions. [2025-03-16 19:03:39,467 INFO L78 Accepts]: Start accepts. Automaton has 37414 states and 67495 transitions. Word has length 171 [2025-03-16 19:03:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:39,467 INFO L471 AbstractCegarLoop]: Abstraction has 37414 states and 67495 transitions. [2025-03-16 19:03:39,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 37414 states and 67495 transitions. [2025-03-16 19:03:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:39,480 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:39,481 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:39,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 19:03:39,481 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:39,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 853804220, now seen corresponding path program 1 times [2025-03-16 19:03:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346520401] [2025-03-16 19:03:39,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:39,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:39,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:39,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:39,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:39,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346520401] [2025-03-16 19:03:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346520401] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:39,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205318083] [2025-03-16 19:03:39,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:39,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:39,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:39,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:39,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:39,598 INFO L87 Difference]: Start difference. First operand 37414 states and 67495 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:42,101 INFO L93 Difference]: Finished difference Result 128526 states and 241139 transitions. [2025-03-16 19:03:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:42,444 INFO L225 Difference]: With dead ends: 128526 [2025-03-16 19:03:42,445 INFO L226 Difference]: Without dead ends: 91131 [2025-03-16 19:03:42,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:42,547 INFO L435 NwaCegarLoop]: 824 mSDtfsCounter, 1184 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 3358 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:42,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 3358 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 19:03:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91131 states. [2025-03-16 19:03:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91131 to 89691. [2025-03-16 19:03:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89691 states, 84011 states have (on average 1.7704705336205973) internal successors, (148739), 86073 states have internal predecessors, (148739), 2845 states have call successors, (2845), 775 states have call predecessors, (2845), 2834 states have return successors, (19227), 2970 states have call predecessors, (19227), 2843 states have call successors, (19227) [2025-03-16 19:03:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89691 states to 89691 states and 170811 transitions. [2025-03-16 19:03:45,407 INFO L78 Accepts]: Start accepts. Automaton has 89691 states and 170811 transitions. Word has length 171 [2025-03-16 19:03:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:03:45,408 INFO L471 AbstractCegarLoop]: Abstraction has 89691 states and 170811 transitions. [2025-03-16 19:03:45,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 89691 states and 170811 transitions. [2025-03-16 19:03:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:03:45,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:03:45,434 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:03:45,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-16 19:03:45,434 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:03:45,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:03:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1563894181, now seen corresponding path program 1 times [2025-03-16 19:03:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:03:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130259588] [2025-03-16 19:03:45,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:03:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:03:45,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:03:45,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:03:45,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:03:45,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:03:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:03:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:03:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130259588] [2025-03-16 19:03:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130259588] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:03:45,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:03:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 19:03:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277116920] [2025-03-16 19:03:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:03:45,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 19:03:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:03:45,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 19:03:45,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 19:03:45,707 INFO L87 Difference]: Start difference. First operand 89691 states and 170811 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:03:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 19:03:50,960 INFO L93 Difference]: Finished difference Result 315001 states and 630513 transitions. [2025-03-16 19:03:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 19:03:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 171 [2025-03-16 19:03:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 19:03:51,962 INFO L225 Difference]: With dead ends: 315001 [2025-03-16 19:03:51,962 INFO L226 Difference]: Without dead ends: 225329 [2025-03-16 19:03:52,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-16 19:03:52,313 INFO L435 NwaCegarLoop]: 821 mSDtfsCounter, 1179 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 19:03:52,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 3346 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 19:03:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225329 states. [2025-03-16 19:03:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225329 to 222676. [2025-03-16 19:03:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222676 states, 209166 states have (on average 1.8052025663826816) internal successors, (377587), 215474 states have internal predecessors, (377587), 5661 states have call successors, (5661), 1543 states have call predecessors, (5661), 7848 states have return successors, (71195), 5914 states have call predecessors, (71195), 5659 states have call successors, (71195) [2025-03-16 19:04:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222676 states to 222676 states and 454443 transitions. [2025-03-16 19:04:01,266 INFO L78 Accepts]: Start accepts. Automaton has 222676 states and 454443 transitions. Word has length 171 [2025-03-16 19:04:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 19:04:01,267 INFO L471 AbstractCegarLoop]: Abstraction has 222676 states and 454443 transitions. [2025-03-16 19:04:01,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 19:04:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 222676 states and 454443 transitions. [2025-03-16 19:04:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-16 19:04:01,308 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 19:04:01,308 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 19:04:01,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-16 19:04:01,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 19:04:01,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 19:04:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1641884452, now seen corresponding path program 1 times [2025-03-16 19:04:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 19:04:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863208102] [2025-03-16 19:04:01,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 19:04:01,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 19:04:01,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 171 statements into 1 equivalence classes. [2025-03-16 19:04:01,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 171 of 171 statements. [2025-03-16 19:04:01,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 19:04:01,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 19:04:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 19:04:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 19:04:01,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863208102] [2025-03-16 19:04:01,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863208102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 19:04:01,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 19:04:01,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 19:04:01,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661427226] [2025-03-16 19:04:01,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 19:04:01,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 19:04:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 19:04:01,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 19:04:01,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 19:04:01,413 INFO L87 Difference]: Start difference. First operand 222676 states and 454443 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)