/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 Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:24,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:24,768 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 15:04:24,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:24,819 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:24,820 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:24,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:24,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:24,821 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:24,823 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:24,824 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:24,824 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:24,824 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:24,825 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:24,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:24,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:24,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:24,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:24,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:24,826 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:24,826 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:24,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:24,830 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:24,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:24,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:24,831 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:24,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:24,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:24,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:24,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:24,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:24,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:24,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:24,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:24,835 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:24,835 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:24,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:24,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:24,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:24,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:24,836 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:24,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:25,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:25,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:25,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:25,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:25,170 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:25,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-10-31 15:04:26,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:26,828 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:26,828 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-10-31 15:04:26,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10af11a2e/8aeaec5dc3ab49c2b0fbb4ac96d1972e/FLAGb2cdb311b [2024-10-31 15:04:26,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10af11a2e/8aeaec5dc3ab49c2b0fbb4ac96d1972e [2024-10-31 15:04:26,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:26,862 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:26,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:26,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:26,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:26,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:26" (1/1) ... [2024-10-31 15:04:26,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7803984d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:26, skipping insertion in model container [2024-10-31 15:04:26,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:26" (1/1) ... [2024-10-31 15:04:26,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:27,075 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-10-31 15:04:27,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:27,163 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:27,177 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-10-31 15:04:27,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:27,249 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:27,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27 WrapperNode [2024-10-31 15:04:27,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:27,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:27,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:27,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:27,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,289 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-10-31 15:04:27,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:27,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:27,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:27,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:27,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,325 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]. [2024-10-31 15:04:27,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:27,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:27,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:27,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:27,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (1/1) ... [2024-10-31 15:04:27,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:27,395 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) [2024-10-31 15:04:27,397 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 [2024-10-31 15:04:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 15:04:27,420 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 15:04:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 15:04:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 15:04:27,508 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:27,510 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:27,933 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:27,933 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:27,953 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:27,953 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:04:27,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:27 BoogieIcfgContainer [2024-10-31 15:04:27,954 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:27,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:27,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:27,961 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:27,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:26" (1/3) ... [2024-10-31 15:04:27,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68aac4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:27, skipping insertion in model container [2024-10-31 15:04:27,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:27" (2/3) ... [2024-10-31 15:04:27,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68aac4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:27, skipping insertion in model container [2024-10-31 15:04:27,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:27" (3/3) ... [2024-10-31 15:04:27,964 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-10-31 15:04:27,982 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:27,983 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:28,046 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:28,053 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;@343b0110, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:28,053 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 15:04:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 15:04:28,064 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:28,065 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:28,066 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:28,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2024-10-31 15:04:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:28,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909870460] [2024-10-31 15:04:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:28,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:28,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:28,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:28,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:28,609 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909870460] [2024-10-31 15:04:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909870460] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:28,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:28,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 15:04:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407966808] [2024-10-31 15:04:28,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:28,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:28,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:28,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:28,644 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:28,909 INFO L93 Difference]: Finished difference Result 175 states and 288 transitions. [2024-10-31 15:04:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-31 15:04:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:28,925 INFO L225 Difference]: With dead ends: 175 [2024-10-31 15:04:28,926 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 15:04:28,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:28,932 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:28,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 623 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 15:04:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-10-31 15:04:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 86 states have internal predecessors, (122), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-10-31 15:04:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 147 transitions. [2024-10-31 15:04:28,991 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 147 transitions. Word has length 32 [2024-10-31 15:04:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:28,991 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 147 transitions. [2024-10-31 15:04:28,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 147 transitions. [2024-10-31 15:04:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 15:04:28,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:28,998 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:28,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:28,998 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:28,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1139634014, now seen corresponding path program 1 times [2024-10-31 15:04:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:28,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591433882] [2024-10-31 15:04:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:29,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:29,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,354 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591433882] [2024-10-31 15:04:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [591433882] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:29,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-10-31 15:04:29,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730113211] [2024-10-31 15:04:29,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:29,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 15:04:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 15:04:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:29,359 INFO L87 Difference]: Start difference. First operand 98 states and 147 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 15:04:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:29,508 INFO L93 Difference]: Finished difference Result 185 states and 285 transitions. [2024-10-31 15:04:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:04:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-10-31 15:04:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:29,512 INFO L225 Difference]: With dead ends: 185 [2024-10-31 15:04:29,512 INFO L226 Difference]: Without dead ends: 120 [2024-10-31 15:04:29,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 15:04:29,515 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 9 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:29,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 577 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-31 15:04:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-10-31 15:04:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 97 states have internal predecessors, (136), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-31 15:04:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2024-10-31 15:04:29,532 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 36 [2024-10-31 15:04:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:29,532 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2024-10-31 15:04:29,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 15:04:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2024-10-31 15:04:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 15:04:29,535 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:29,535 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:29,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:29,536 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:29,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1018252548, now seen corresponding path program 1 times [2024-10-31 15:04:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850945389] [2024-10-31 15:04:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:29,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:29,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:29,859 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850945389] [2024-10-31 15:04:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [850945389] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:29,861 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:29,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-10-31 15:04:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744088271] [2024-10-31 15:04:29,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:29,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:29,865 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:30,008 INFO L93 Difference]: Finished difference Result 250 states and 374 transitions. [2024-10-31 15:04:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2024-10-31 15:04:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:30,011 INFO L225 Difference]: With dead ends: 250 [2024-10-31 15:04:30,011 INFO L226 Difference]: Without dead ends: 189 [2024-10-31 15:04:30,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:30,015 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 92 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:30,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 424 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-31 15:04:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-10-31 15:04:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2024-10-31 15:04:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 275 transitions. [2024-10-31 15:04:30,049 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 275 transitions. Word has length 40 [2024-10-31 15:04:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:30,049 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 275 transitions. [2024-10-31 15:04:30,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 275 transitions. [2024-10-31 15:04:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 15:04:30,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:30,055 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:30,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:30,056 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:30,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -338194178, now seen corresponding path program 1 times [2024-10-31 15:04:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7112867] [2024-10-31 15:04:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:30,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:30,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:30,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,351 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:30,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7112867] [2024-10-31 15:04:30,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [7112867] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:30,352 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:30,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2024-10-31 15:04:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412787251] [2024-10-31 15:04:30,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:30,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:30,356 INFO L87 Difference]: Start difference. First operand 187 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:30,506 INFO L93 Difference]: Finished difference Result 235 states and 344 transitions. [2024-10-31 15:04:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-10-31 15:04:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:30,509 INFO L225 Difference]: With dead ends: 235 [2024-10-31 15:04:30,509 INFO L226 Difference]: Without dead ends: 180 [2024-10-31 15:04:30,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:30,510 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 33 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:30,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 588 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-31 15:04:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-10-31 15:04:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-31 15:04:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2024-10-31 15:04:30,523 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2024-10-31 15:04:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:30,523 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2024-10-31 15:04:30,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2024-10-31 15:04:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 15:04:30,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:30,525 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:30,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:30,526 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:30,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2024-10-31 15:04:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623662538] [2024-10-31 15:04:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:30,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 15:04:30,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:30,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:30,816 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623662538] [2024-10-31 15:04:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623662538] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:30,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:30,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-10-31 15:04:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582378489] [2024-10-31 15:04:30,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:30,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:04:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:04:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:30,818 INFO L87 Difference]: Start difference. First operand 178 states and 258 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,033 INFO L93 Difference]: Finished difference Result 276 states and 407 transitions. [2024-10-31 15:04:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-31 15:04:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,036 INFO L225 Difference]: With dead ends: 276 [2024-10-31 15:04:31,036 INFO L226 Difference]: Without dead ends: 222 [2024-10-31 15:04:31,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:31,039 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 25 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 382 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-31 15:04:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2024-10-31 15:04:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 189 states have (on average 1.3756613756613756) internal successors, (260), 190 states have internal predecessors, (260), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2024-10-31 15:04:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 312 transitions. [2024-10-31 15:04:31,064 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 312 transitions. Word has length 43 [2024-10-31 15:04:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,065 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 312 transitions. [2024-10-31 15:04:31,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 312 transitions. [2024-10-31 15:04:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 15:04:31,067 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,067 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:31,067 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2024816019, now seen corresponding path program 1 times [2024-10-31 15:04:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232178444] [2024-10-31 15:04:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:31,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:31,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,221 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232178444] [2024-10-31 15:04:31,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [232178444] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:31,221 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:31,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 15:04:31,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171947072] [2024-10-31 15:04:31,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:31,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:31,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:31,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:31,223 INFO L87 Difference]: Start difference. First operand 216 states and 312 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,296 INFO L93 Difference]: Finished difference Result 270 states and 391 transitions. [2024-10-31 15:04:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-31 15:04:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,298 INFO L225 Difference]: With dead ends: 270 [2024-10-31 15:04:31,299 INFO L226 Difference]: Without dead ends: 268 [2024-10-31 15:04:31,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:31,300 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 65 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 806 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-31 15:04:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 222. [2024-10-31 15:04:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 192 states have (on average 1.3697916666666667) internal successors, (263), 195 states have internal predecessors, (263), 25 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (31), 29 states have call predecessors, (31), 24 states have call successors, (31) [2024-10-31 15:04:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 319 transitions. [2024-10-31 15:04:31,313 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 319 transitions. Word has length 43 [2024-10-31 15:04:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,313 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 319 transitions. [2024-10-31 15:04:31,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 319 transitions. [2024-10-31 15:04:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:31,315 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,315 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:31,315 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2024-10-31 15:04:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119021752] [2024-10-31 15:04:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:31,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 15:04:31,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:31,417 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119021752] [2024-10-31 15:04:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [119021752] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:31,417 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:31,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-10-31 15:04:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882157778] [2024-10-31 15:04:31,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:31,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:31,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:31,419 INFO L87 Difference]: Start difference. First operand 222 states and 319 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:31,460 INFO L93 Difference]: Finished difference Result 229 states and 325 transitions. [2024-10-31 15:04:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:04:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 15:04:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:31,464 INFO L225 Difference]: With dead ends: 229 [2024-10-31 15:04:31,464 INFO L226 Difference]: Without dead ends: 222 [2024-10-31 15:04:31,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:31,465 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 3 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:31,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 686 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-31 15:04:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-10-31 15:04:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 192 states have (on average 1.3541666666666667) internal successors, (260), 195 states have internal predecessors, (260), 25 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (31), 29 states have call predecessors, (31), 24 states have call successors, (31) [2024-10-31 15:04:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 316 transitions. [2024-10-31 15:04:31,483 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 316 transitions. Word has length 44 [2024-10-31 15:04:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:31,484 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 316 transitions. [2024-10-31 15:04:31,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 316 transitions. [2024-10-31 15:04:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:31,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:31,486 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:31,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:31,486 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:31,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2024-10-31 15:04:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201213002] [2024-10-31 15:04:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:32,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-31 15:04:32,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 15:04:32,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:04:32,787 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:32,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201213002] [2024-10-31 15:04:32,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [201213002] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:32,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:32,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2024-10-31 15:04:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547766202] [2024-10-31 15:04:32,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:32,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:32,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-10-31 15:04:32,789 INFO L87 Difference]: Start difference. First operand 222 states and 316 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:33,293 INFO L93 Difference]: Finished difference Result 325 states and 468 transitions. [2024-10-31 15:04:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 15:04:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-10-31 15:04:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:33,296 INFO L225 Difference]: With dead ends: 325 [2024-10-31 15:04:33,296 INFO L226 Difference]: Without dead ends: 323 [2024-10-31 15:04:33,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-10-31 15:04:33,300 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 74 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:33,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 755 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:04:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-10-31 15:04:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 226. [2024-10-31 15:04:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 195 states have (on average 1.3487179487179488) internal successors, (263), 198 states have internal predecessors, (263), 25 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (31), 29 states have call predecessors, (31), 24 states have call successors, (31) [2024-10-31 15:04:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 319 transitions. [2024-10-31 15:04:33,320 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 319 transitions. Word has length 44 [2024-10-31 15:04:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:33,320 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 319 transitions. [2024-10-31 15:04:33,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 319 transitions. [2024-10-31 15:04:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:33,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:33,324 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:33,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:33,324 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:33,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1026367148, now seen corresponding path program 1 times [2024-10-31 15:04:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:33,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630838024] [2024-10-31 15:04:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:33,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:04:33,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:33,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:33,560 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630838024] [2024-10-31 15:04:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [630838024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:33,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2024-10-31 15:04:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573836056] [2024-10-31 15:04:33,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:33,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:33,562 INFO L87 Difference]: Start difference. First operand 226 states and 319 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:33,777 INFO L93 Difference]: Finished difference Result 421 states and 603 transitions. [2024-10-31 15:04:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-10-31 15:04:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:33,780 INFO L225 Difference]: With dead ends: 421 [2024-10-31 15:04:33,780 INFO L226 Difference]: Without dead ends: 387 [2024-10-31 15:04:33,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:33,783 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 63 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:33,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 690 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-10-31 15:04:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 235. [2024-10-31 15:04:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 205 states have (on average 1.3560975609756099) internal successors, (278), 205 states have internal predecessors, (278), 24 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-10-31 15:04:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 332 transitions. [2024-10-31 15:04:33,802 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 332 transitions. Word has length 45 [2024-10-31 15:04:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:33,803 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 332 transitions. [2024-10-31 15:04:33,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 332 transitions. [2024-10-31 15:04:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 15:04:33,805 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:33,805 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:33,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:33,805 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:33,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2024-10-31 15:04:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806713830] [2024-10-31 15:04:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:33,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 15:04:33,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:33,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:34,012 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806713830] [2024-10-31 15:04:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [806713830] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:34,012 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 15:04:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111235135] [2024-10-31 15:04:34,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:34,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:34,014 INFO L87 Difference]: Start difference. First operand 235 states and 332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:34,328 INFO L93 Difference]: Finished difference Result 304 states and 426 transitions. [2024-10-31 15:04:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 15:04:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-10-31 15:04:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:34,330 INFO L225 Difference]: With dead ends: 304 [2024-10-31 15:04:34,331 INFO L226 Difference]: Without dead ends: 270 [2024-10-31 15:04:34,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:04:34,332 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 78 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:34,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 435 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-10-31 15:04:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 208. [2024-10-31 15:04:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 180 states have (on average 1.35) internal successors, (243), 178 states have internal predecessors, (243), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2024-10-31 15:04:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 293 transitions. [2024-10-31 15:04:34,350 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 293 transitions. Word has length 45 [2024-10-31 15:04:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:34,350 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 293 transitions. [2024-10-31 15:04:34,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 293 transitions. [2024-10-31 15:04:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:34,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:34,351 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:34,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:34,352 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:34,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2024-10-31 15:04:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:34,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30620612] [2024-10-31 15:04:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:34,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:04:34,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:34,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:34,405 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30620612] [2024-10-31 15:04:34,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [30620612] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:34,406 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:34,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 15:04:34,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066957981] [2024-10-31 15:04:34,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:34,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:34,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:34,407 INFO L87 Difference]: Start difference. First operand 208 states and 293 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:34,430 INFO L93 Difference]: Finished difference Result 221 states and 307 transitions. [2024-10-31 15:04:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-10-31 15:04:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:34,432 INFO L225 Difference]: With dead ends: 221 [2024-10-31 15:04:34,432 INFO L226 Difference]: Without dead ends: 197 [2024-10-31 15:04:34,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:34,433 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:34,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-31 15:04:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2024-10-31 15:04:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 167 states have (on average 1.3233532934131738) internal successors, (221), 164 states have internal predecessors, (221), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2024-10-31 15:04:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 268 transitions. [2024-10-31 15:04:34,449 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 268 transitions. Word has length 48 [2024-10-31 15:04:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:34,449 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 268 transitions. [2024-10-31 15:04:34,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 268 transitions. [2024-10-31 15:04:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 15:04:34,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:34,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:34,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:04:34,451 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:34,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash -93885056, now seen corresponding path program 1 times [2024-10-31 15:04:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:34,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681268684] [2024-10-31 15:04:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:34,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:34,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:34,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:34,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:34,694 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681268684] [2024-10-31 15:04:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681268684] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:34,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2024-10-31 15:04:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765168774] [2024-10-31 15:04:34,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:34,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:04:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:04:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:34,696 INFO L87 Difference]: Start difference. First operand 194 states and 268 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 15:04:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:35,061 INFO L93 Difference]: Finished difference Result 280 states and 376 transitions. [2024-10-31 15:04:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:04:35,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2024-10-31 15:04:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:35,064 INFO L225 Difference]: With dead ends: 280 [2024-10-31 15:04:35,064 INFO L226 Difference]: Without dead ends: 269 [2024-10-31 15:04:35,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:04:35,065 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 56 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:35,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1157 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:04:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-10-31 15:04:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 247. [2024-10-31 15:04:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 216 states have (on average 1.2916666666666667) internal successors, (279), 213 states have internal predecessors, (279), 25 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-10-31 15:04:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 334 transitions. [2024-10-31 15:04:35,077 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 334 transitions. Word has length 51 [2024-10-31 15:04:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:35,078 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 334 transitions. [2024-10-31 15:04:35,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 15:04:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 334 transitions. [2024-10-31 15:04:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 15:04:35,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:35,079 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:04:35,079 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:35,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -36626754, now seen corresponding path program 1 times [2024-10-31 15:04:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:35,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415927731] [2024-10-31 15:04:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:35,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:35,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,212 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415927731] [2024-10-31 15:04:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415927731] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:04:35,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:04:35,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2024-10-31 15:04:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46508754] [2024-10-31 15:04:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:35,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 15:04:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 15:04:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:04:35,214 INFO L87 Difference]: Start difference. First operand 247 states and 334 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:35,281 INFO L93 Difference]: Finished difference Result 278 states and 372 transitions. [2024-10-31 15:04:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-10-31 15:04:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:35,283 INFO L225 Difference]: With dead ends: 278 [2024-10-31 15:04:35,283 INFO L226 Difference]: Without dead ends: 226 [2024-10-31 15:04:35,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-31 15:04:35,284 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 17 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:35,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 535 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-31 15:04:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 183. [2024-10-31 15:04:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 152 states have (on average 1.3289473684210527) internal successors, (202), 155 states have internal predecessors, (202), 24 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2024-10-31 15:04:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 251 transitions. [2024-10-31 15:04:35,295 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 251 transitions. Word has length 51 [2024-10-31 15:04:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:35,295 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 251 transitions. [2024-10-31 15:04:35,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-31 15:04:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 251 transitions. [2024-10-31 15:04:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:04:35,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:35,297 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:35,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:04:35,297 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:35,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2024-10-31 15:04:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:35,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534168605] [2024-10-31 15:04:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:35,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 15:04:35,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:35,516 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:35,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534168605] [2024-10-31 15:04:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534168605] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:35,517 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-10-31 15:04:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51128574] [2024-10-31 15:04:35,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:35,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 15:04:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 15:04:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-31 15:04:35,518 INFO L87 Difference]: Start difference. First operand 183 states and 251 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:35,987 INFO L93 Difference]: Finished difference Result 283 states and 383 transitions. [2024-10-31 15:04:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 15:04:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-10-31 15:04:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:35,989 INFO L225 Difference]: With dead ends: 283 [2024-10-31 15:04:35,989 INFO L226 Difference]: Without dead ends: 235 [2024-10-31 15:04:35,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-31 15:04:35,990 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 70 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:35,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 615 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:04:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-31 15:04:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 212. [2024-10-31 15:04:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 181 states have internal predecessors, (231), 26 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (27), 27 states have call predecessors, (27), 24 states have call successors, (27) [2024-10-31 15:04:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 284 transitions. [2024-10-31 15:04:36,006 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 284 transitions. Word has length 50 [2024-10-31 15:04:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:36,007 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 284 transitions. [2024-10-31 15:04:36,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 284 transitions. [2024-10-31 15:04:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 15:04:36,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:36,008 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:36,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:04:36,009 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:36,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:36,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2024-10-31 15:04:36,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:36,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123142855] [2024-10-31 15:04:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:36,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:36,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 15:04:36,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:36,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 15:04:36,083 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123142855] [2024-10-31 15:04:36,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123142855] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:36,083 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:36,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-10-31 15:04:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425386612] [2024-10-31 15:04:36,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:36,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 15:04:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 15:04:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:36,085 INFO L87 Difference]: Start difference. First operand 212 states and 284 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:36,103 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2024-10-31 15:04:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 15:04:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-10-31 15:04:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:36,105 INFO L225 Difference]: With dead ends: 221 [2024-10-31 15:04:36,105 INFO L226 Difference]: Without dead ends: 168 [2024-10-31 15:04:36,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 15:04:36,106 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:36,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-10-31 15:04:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2024-10-31 15:04:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 133 states have internal predecessors, (167), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2024-10-31 15:04:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2024-10-31 15:04:36,119 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 52 [2024-10-31 15:04:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:36,120 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2024-10-31 15:04:36,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2024-10-31 15:04:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 15:04:36,121 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:36,121 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:36,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:04:36,121 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:36,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 147478644, now seen corresponding path program 1 times [2024-10-31 15:04:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:36,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131503831] [2024-10-31 15:04:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:38,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 15:04:38,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 15:04:41,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:04:41,963 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131503831] [2024-10-31 15:04:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131503831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:41,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:41,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 27 [2024-10-31 15:04:41,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522550386] [2024-10-31 15:04:41,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:41,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-31 15:04:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-31 15:04:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-10-31 15:04:41,965 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 25 states have internal predecessors, (58), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:04:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,216 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2024-10-31 15:04:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 15:04:44,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 25 states have internal predecessors, (58), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-10-31 15:04:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,217 INFO L225 Difference]: With dead ends: 224 [2024-10-31 15:04:44,217 INFO L226 Difference]: Without dead ends: 138 [2024-10-31 15:04:44,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 15:04:44,219 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 28 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1181 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 15:04:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-31 15:04:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2024-10-31 15:04:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 115 states have internal predecessors, (140), 18 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2024-10-31 15:04:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2024-10-31 15:04:44,229 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 54 [2024-10-31 15:04:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,229 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2024-10-31 15:04:44,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 25 states have internal predecessors, (58), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-31 15:04:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2024-10-31 15:04:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-31 15:04:44,230 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,230 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:44,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:04:44,230 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1768875186, now seen corresponding path program 1 times [2024-10-31 15:04:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552532886] [2024-10-31 15:04:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:05:21,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:05:22,244 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552532886] [2024-10-31 15:05:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552532886] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:22,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-31 15:05:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773398944] [2024-10-31 15:05:22,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:22,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 15:05:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 15:05:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=293, Unknown=10, NotChecked=0, Total=380 [2024-10-31 15:05:22,246 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand has 20 states, 16 states have (on average 2.875) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 15:05:26,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:29,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:32,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:34,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:38,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:42,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:51,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:05:59,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]