/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount25_file-91.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 01:35:00,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 01:35:00,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 01:35:00,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 01:35:00,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 01:35:00,560 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 01:35:00,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 01:35:00,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 01:35:00,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 01:35:00,565 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 01:35:00,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 01:35:00,566 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 01:35:00,567 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 01:35:00,567 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 01:35:00,568 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 01:35:00,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 01:35:00,568 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 01:35:00,569 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 01:35:00,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 01:35:00,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 01:35:00,569 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 01:35:00,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 01:35:00,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 01:35:00,570 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 01:35:00,571 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 01:35:00,571 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 01:35:00,571 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 01:35:00,571 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 01:35:00,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 01:35:00,572 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 01:35:00,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 01:35:00,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 01:35:00,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 01:35:00,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 01:35:00,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 01:35:00,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 01:35:00,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 01:35:00,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 01:35:00,574 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 01:35:00,575 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 01:35:00,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 01:35:00,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 01:35:00,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 01:35:00,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 01:35:00,576 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 01:35:00,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 01:35:00,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 01:35:00,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 01:35:00,836 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 01:35:00,836 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 01:35:00,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount25_file-91.i [2024-11-03 01:35:02,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 01:35:02,480 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 01:35:02,480 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount25_file-91.i [2024-11-03 01:35:02,488 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96e5971ed/4cf8c52ed8d047189ecaf5e9e671ef9e/FLAGa91f742d5 [2024-11-03 01:35:02,877 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96e5971ed/4cf8c52ed8d047189ecaf5e9e671ef9e [2024-11-03 01:35:02,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 01:35:02,882 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 01:35:02,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 01:35:02,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 01:35:02,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 01:35:02,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:02" (1/1) ... [2024-11-03 01:35:02,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75858ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:02, skipping insertion in model container [2024-11-03 01:35:02,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:02" (1/1) ... [2024-11-03 01:35:02,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 01:35:03,067 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount25_file-91.i[915,928] [2024-11-03 01:35:03,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 01:35:03,117 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 01:35:03,135 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount25_file-91.i[915,928] [2024-11-03 01:35:03,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 01:35:03,174 INFO L204 MainTranslator]: Completed translation [2024-11-03 01:35:03,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03 WrapperNode [2024-11-03 01:35:03,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 01:35:03,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 01:35:03,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 01:35:03,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 01:35:03,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,210 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 90 [2024-11-03 01:35:03,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 01:35:03,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 01:35:03,213 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 01:35:03,213 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 01:35:03,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,231 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,244 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]. [2024-11-03 01:35:03,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,253 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 01:35:03,260 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 01:35:03,260 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 01:35:03,260 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 01:35:03,261 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (1/1) ... [2024-11-03 01:35:03,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 01:35:03,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 01:35:03,291 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) [2024-11-03 01:35:03,298 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 [2024-11-03 01:35:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 01:35:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 01:35:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-03 01:35:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-03 01:35:03,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 01:35:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 01:35:03,408 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 01:35:03,411 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 01:35:03,776 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-03 01:35:03,776 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 01:35:03,791 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 01:35:03,791 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-03 01:35:03,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:03 BoogieIcfgContainer [2024-11-03 01:35:03,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 01:35:03,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 01:35:03,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 01:35:03,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 01:35:03,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:35:02" (1/3) ... [2024-11-03 01:35:03,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e15438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:03, skipping insertion in model container [2024-11-03 01:35:03,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:03" (2/3) ... [2024-11-03 01:35:03,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e15438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:03, skipping insertion in model container [2024-11-03 01:35:03,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:03" (3/3) ... [2024-11-03 01:35:03,800 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount25_file-91.i [2024-11-03 01:35:03,815 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 01:35:03,816 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 01:35:03,912 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 01:35:03,920 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;@54c609d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 01:35:03,920 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 01:35:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-03 01:35:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-03 01:35:03,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 01:35:03,936 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 01:35:03,936 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 01:35:03,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 01:35:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1820528867, now seen corresponding path program 1 times [2024-11-03 01:35:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 01:35:03,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948180054] [2024-11-03 01:35:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 01:35:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 01:35:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 01:35:03,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 01:35:03,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 01:35:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 01:35:04,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-03 01:35:04,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 01:35:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-03 01:35:06,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 01:35:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-03 01:35:36,083 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 01:35:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948180054] [2024-11-03 01:35:36,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948180054] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 01:35:36,084 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 01:35:36,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-11-03 01:35:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703813204] [2024-11-03 01:35:36,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 01:35:36,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 01:35:36,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 01:35:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 01:35:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-03 01:35:36,112 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-03 01:35:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 01:35:46,730 INFO L93 Difference]: Finished difference Result 167 states and 283 transitions. [2024-11-03 01:35:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 01:35:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 73 [2024-11-03 01:35:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 01:35:46,744 INFO L225 Difference]: With dead ends: 167 [2024-11-03 01:35:46,744 INFO L226 Difference]: Without dead ends: 128 [2024-11-03 01:35:46,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2024-11-03 01:35:46,750 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 246 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-03 01:35:46,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 310 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-03 01:35:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-03 01:35:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2024-11-03 01:35:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-03 01:35:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2024-11-03 01:35:46,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 73 [2024-11-03 01:35:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 01:35:46,815 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2024-11-03 01:35:46,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-03 01:35:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2024-11-03 01:35:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-03 01:35:46,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 01:35:46,819 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 01:35:46,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-03 01:35:47,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 01:35:47,024 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 01:35:47,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 01:35:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1877787169, now seen corresponding path program 1 times [2024-11-03 01:35:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 01:35:47,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027087412] [2024-11-03 01:35:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 01:35:47,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 01:35:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 01:35:47,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 01:35:47,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 01:35:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 01:35:47,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-03 01:35:47,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 01:35:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-03 01:35:50,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 01:36:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-03 01:36:01,816 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 01:36:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027087412] [2024-11-03 01:36:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027087412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 01:36:01,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 01:36:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-03 01:36:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503811885] [2024-11-03 01:36:01,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 01:36:01,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-03 01:36:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 01:36:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-03 01:36:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-03 01:36:01,820 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-03 01:36:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 01:36:21,136 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2024-11-03 01:36:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-03 01:36:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 73 [2024-11-03 01:36:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 01:36:21,142 INFO L225 Difference]: With dead ends: 139 [2024-11-03 01:36:21,142 INFO L226 Difference]: Without dead ends: 137 [2024-11-03 01:36:21,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2024-11-03 01:36:21,144 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 182 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-03 01:36:21,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 391 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-03 01:36:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-03 01:36:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 49. [2024-11-03 01:36:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-03 01:36:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-11-03 01:36:21,160 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 73 [2024-11-03 01:36:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 01:36:21,160 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-11-03 01:36:21,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-03 01:36:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-11-03 01:36:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 01:36:21,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 01:36:21,163 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 01:36:21,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 01:36:21,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 01:36:21,364 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 01:36:21,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 01:36:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash 366259724, now seen corresponding path program 1 times [2024-11-03 01:36:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 01:36:21,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804226176] [2024-11-03 01:36:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 01:36:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 01:36:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 01:36:21,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 01:36:21,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 01:36:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 01:36:21,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-03 01:36:21,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 01:36:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-03 01:36:23,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 01:36:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-03 01:36:35,369 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 01:36:35,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804226176] [2024-11-03 01:36:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804226176] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 01:36:35,370 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 01:36:35,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2024-11-03 01:36:35,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579859793] [2024-11-03 01:36:35,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 01:36:35,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-03 01:36:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 01:36:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-03 01:36:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-03 01:36:35,372 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11)