/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_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:04:40,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:04:40,602 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 15:04:40,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:04:40,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:04:40,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:04:40,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:04:40,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:04:40,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:04:40,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:04:40,633 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:04:40,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:04:40,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:04:40,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:04:40,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:04:40,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:04:40,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:04:40,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:04:40,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:04:40,636 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:04:40,636 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:04:40,638 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:04:40,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:04:40,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:40,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:04:40,640 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:04:40,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:04:40,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:04:40,641 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:04:40,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:04:40,641 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:04:40,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:04:40,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:04:40,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:04:40,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:04:40,911 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:04:40,912 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:04:40,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 15:04:42,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:04:42,441 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:04:42,441 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 15:04:42,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108996d90/cf638a9906ce4f22bf91be9b06544829/FLAGa477ecc87 [2024-10-31 15:04:42,821 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108996d90/cf638a9906ce4f22bf91be9b06544829 [2024-10-31 15:04:42,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:04:42,824 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:04:42,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:42,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:04:42,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:04:42,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:42" (1/1) ... [2024-10-31 15:04:42,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@759b02f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:42, skipping insertion in model container [2024-10-31 15:04:42,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:04:42" (1/1) ... [2024-10-31 15:04:42,846 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:04:42,977 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_4-2a.c.cil.c[755,768] [2024-10-31 15:04:43,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:43,026 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:04:43,034 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_4-2a.c.cil.c[755,768] [2024-10-31 15:04:43,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:04:43,060 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:04:43,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43 WrapperNode [2024-10-31 15:04:43,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:04:43,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:43,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:04:43,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:04:43,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,084 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-10-31 15:04:43,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:04:43,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:04:43,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:04:43,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:04:43,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,094 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,101 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 15:04:43,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,109 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:04:43,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:04:43,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:04:43,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:04:43,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (1/1) ... [2024-10-31 15:04:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:04:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:04:43,133 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 15:04:43,137 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 15:04:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:04:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:04:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 15:04:43,156 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 15:04:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:04:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:04:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-10-31 15:04:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-10-31 15:04:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 15:04:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 15:04:43,213 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:04:43,215 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:04:43,419 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-10-31 15:04:43,420 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:04:43,438 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:04:43,438 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 15:04:43,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:43 BoogieIcfgContainer [2024-10-31 15:04:43,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:04:43,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:04:43,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:04:43,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:04:43,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:04:42" (1/3) ... [2024-10-31 15:04:43,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9b2fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:43, skipping insertion in model container [2024-10-31 15:04:43,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:04:43" (2/3) ... [2024-10-31 15:04:43,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9b2fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:04:43, skipping insertion in model container [2024-10-31 15:04:43,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:04:43" (3/3) ... [2024-10-31 15:04:43,444 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-10-31 15:04:43,454 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:04:43,454 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:04:43,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:04:43,520 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;@3fcb51d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:04:43,520 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:04:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 15:04:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 15:04:43,528 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:43,528 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] [2024-10-31 15:04:43,528 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:43,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-10-31 15:04:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:43,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908421718] [2024-10-31 15:04:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:43,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:43,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:43,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:43,769 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 15:04:43,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:43,822 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 15:04:43,823 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908421718] [2024-10-31 15:04:43,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [908421718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:43,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:43,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-10-31 15:04:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934877378] [2024-10-31 15:04:43,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:43,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:43,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:43,848 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:43,988 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-10-31 15:04:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 15:04:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-31 15:04:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:43,998 INFO L225 Difference]: With dead ends: 128 [2024-10-31 15:04:43,998 INFO L226 Difference]: Without dead ends: 71 [2024-10-31 15:04:44,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 15:04:44,006 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-31 15:04:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-10-31 15:04:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-31 15:04:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-10-31 15:04:44,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-10-31 15:04:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,038 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-10-31 15:04:44,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 15:04:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-10-31 15:04:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 15:04:44,043 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,043 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] [2024-10-31 15:04:44,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:04:44,044 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-10-31 15:04:44,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905456916] [2024-10-31 15:04:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,257 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 15:04:44,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,301 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 15:04:44,301 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905456916] [2024-10-31 15:04:44,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905456916] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:44,302 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2024-10-31 15:04:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390486839] [2024-10-31 15:04:44,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:44,304 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,379 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-10-31 15:04:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:04:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-31 15:04:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,381 INFO L225 Difference]: With dead ends: 118 [2024-10-31 15:04:44,381 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 15:04:44,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:44,383 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 411 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:04:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 15:04:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-10-31 15:04:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-10-31 15:04:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-10-31 15:04:44,398 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-10-31 15:04:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,398 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-10-31 15:04:44,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-10-31 15:04:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 15:04:44,399 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,399 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] [2024-10-31 15:04:44,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:04:44,400 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-10-31 15:04:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625027855] [2024-10-31 15:04:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:44,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:44,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:44,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:04:44,580 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:44,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625027855] [2024-10-31 15:04:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625027855] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:44,580 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-10-31 15:04:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276694912] [2024-10-31 15:04:44,581 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:44,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:44,582 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:44,662 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-10-31 15:04:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 15:04:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-10-31 15:04:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:44,664 INFO L225 Difference]: With dead ends: 108 [2024-10-31 15:04:44,664 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 15:04:44,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 15:04:44,665 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:44,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 501 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 15:04:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-10-31 15:04:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 15:04:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-10-31 15:04:44,673 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-10-31 15:04:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:44,673 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-10-31 15:04:44,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:04:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-10-31 15:04:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 15:04:44,674 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:44,674 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] [2024-10-31 15:04:44,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 15:04:44,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:44,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-10-31 15:04:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:44,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205603676] [2024-10-31 15:04:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:46,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 15:04:46,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:46,537 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 15:04:46,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:46,619 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 15:04:46,619 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205603676] [2024-10-31 15:04:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [205603676] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:46,619 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:46,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 15:04:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330420270] [2024-10-31 15:04:46,620 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:46,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:04:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:04:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:04:46,621 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:47,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 15:04:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:47,985 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2024-10-31 15:04:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-10-31 15:04:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:47,986 INFO L225 Difference]: With dead ends: 90 [2024-10-31 15:04:47,986 INFO L226 Difference]: Without dead ends: 88 [2024-10-31 15:04:47,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 2 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 15:04:47,987 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:47,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 365 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2024-10-31 15:04:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-31 15:04:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2024-10-31 15:04:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 15:04:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-10-31 15:04:47,998 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-10-31 15:04:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:47,998 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-10-31 15:04:47,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 15:04:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-10-31 15:04:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:47,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:47,999 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:04:47,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 15:04:48,000 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:48,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-10-31 15:04:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165548626] [2024-10-31 15:04:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:48,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:04:48,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,128 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:48,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165548626] [2024-10-31 15:04:48,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [165548626] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:48,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:48,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-10-31 15:04:48,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647531144] [2024-10-31 15:04:48,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:48,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:04:48,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:04:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:48,130 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 15:04:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:48,187 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-10-31 15:04:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:04:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-10-31 15:04:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:48,188 INFO L225 Difference]: With dead ends: 117 [2024-10-31 15:04:48,188 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 15:04:48,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:48,189 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:48,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 421 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 15:04:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-10-31 15:04:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 15:04:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-10-31 15:04:48,197 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-10-31 15:04:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:48,198 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-10-31 15:04:48,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 15:04:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-10-31 15:04:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 15:04:48,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:48,199 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-31 15:04:48,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 15:04:48,199 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:48,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-10-31 15:04:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:48,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124738034] [2024-10-31 15:04:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:48,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:48,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 15:04:48,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,426 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124738034] [2024-10-31 15:04:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [124738034] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:48,426 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 12] imperfect sequences [] total 17 [2024-10-31 15:04:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866838627] [2024-10-31 15:04:48,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:48,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 15:04:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 15:04:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-10-31 15:04:48,427 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:04:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:48,625 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2024-10-31 15:04:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 15:04:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-10-31 15:04:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:48,627 INFO L225 Difference]: With dead ends: 131 [2024-10-31 15:04:48,627 INFO L226 Difference]: Without dead ends: 124 [2024-10-31 15:04:48,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-10-31 15:04:48,628 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:48,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 785 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-10-31 15:04:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2024-10-31 15:04:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 15:04:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2024-10-31 15:04:48,638 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2024-10-31 15:04:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:48,639 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2024-10-31 15:04:48,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:04:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2024-10-31 15:04:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 15:04:48,640 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:48,640 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-31 15:04:48,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 15:04:48,640 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:48,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-10-31 15:04:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477448505] [2024-10-31 15:04:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:48,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 15:04:48,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:04:48,840 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:48,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477448505] [2024-10-31 15:04:48,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [477448505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:48,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:48,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2024-10-31 15:04:48,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125735426] [2024-10-31 15:04:48,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:48,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 15:04:48,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:48,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 15:04:48,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-10-31 15:04:48,841 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:04:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:49,024 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-10-31 15:04:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 15:04:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-10-31 15:04:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:49,026 INFO L225 Difference]: With dead ends: 138 [2024-10-31 15:04:49,026 INFO L226 Difference]: Without dead ends: 130 [2024-10-31 15:04:49,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-10-31 15:04:49,027 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 23 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:49,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 762 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:04:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-31 15:04:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2024-10-31 15:04:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2024-10-31 15:04:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-10-31 15:04:49,035 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2024-10-31 15:04:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:49,036 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-10-31 15:04:49,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:04:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-10-31 15:04:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 15:04:49,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:49,037 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-31 15:04:49,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 15:04:49,037 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:49,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-10-31 15:04:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:49,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240963396] [2024-10-31 15:04:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:49,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 15:04:49,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:49,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:04:49,128 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240963396] [2024-10-31 15:04:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [240963396] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:04:49,128 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:04:49,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-10-31 15:04:49,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005229264] [2024-10-31 15:04:49,128 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:04:49,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 15:04:49,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 15:04:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 15:04:49,129 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 15:04:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:49,156 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-10-31 15:04:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 15:04:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-10-31 15:04:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:49,157 INFO L225 Difference]: With dead ends: 118 [2024-10-31 15:04:49,157 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 15:04:49,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:04:49,158 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:49,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:04:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 15:04:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-10-31 15:04:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 80 states have internal predecessors, (93), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-31 15:04:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2024-10-31 15:04:49,164 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 46 [2024-10-31 15:04:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:49,165 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2024-10-31 15:04:49,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 15:04:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2024-10-31 15:04:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:49,165 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:49,166 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, 1, 1, 1, 1] [2024-10-31 15:04:49,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 15:04:49,166 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:49,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-10-31 15:04:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:49,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954812171] [2024-10-31 15:04:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:49,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:49,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 15:04:49,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:49,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:49,577 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954812171] [2024-10-31 15:04:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [954812171] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:49,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:49,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 15:04:49,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994433658] [2024-10-31 15:04:49,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:49,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 15:04:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 15:04:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 15:04:49,579 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:04:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:50,293 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2024-10-31 15:04:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 15:04:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 15:04:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:50,294 INFO L225 Difference]: With dead ends: 150 [2024-10-31 15:04:50,294 INFO L226 Difference]: Without dead ends: 137 [2024-10-31 15:04:50,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 15:04:50,296 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 73 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:50,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 989 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 15:04:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-31 15:04:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2024-10-31 15:04:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 86 states have internal predecessors, (98), 16 states have call successors, (16), 7 states have call predecessors, (16), 12 states have return successors, (29), 16 states have call predecessors, (29), 14 states have call successors, (29) [2024-10-31 15:04:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-10-31 15:04:50,304 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 48 [2024-10-31 15:04:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:50,304 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-10-31 15:04:50,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:04:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-10-31 15:04:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 15:04:50,305 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:50,305 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, 1, 1, 1, 1] [2024-10-31 15:04:50,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 15:04:50,305 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:50,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-10-31 15:04:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803676334] [2024-10-31 15:04:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:04:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:04:50,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 15:04:50,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:04:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:50,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:04:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 15:04:50,703 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:04:50,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803676334] [2024-10-31 15:04:50,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [803676334] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:04:50,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:04:50,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 15:04:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412142456] [2024-10-31 15:04:50,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:04:50,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 15:04:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:04:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 15:04:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 15:04:50,705 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:04:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:04:51,419 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2024-10-31 15:04:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 15:04:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 15:04:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:04:51,421 INFO L225 Difference]: With dead ends: 149 [2024-10-31 15:04:51,421 INFO L226 Difference]: Without dead ends: 134 [2024-10-31 15:04:51,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 15:04:51,447 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 57 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 15:04:51,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1102 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 15:04:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-31 15:04:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-10-31 15:04:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2024-10-31 15:04:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 143 transitions. [2024-10-31 15:04:51,459 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 143 transitions. Word has length 48 [2024-10-31 15:04:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:04:51,459 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 143 transitions. [2024-10-31 15:04:51,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:04:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 143 transitions. [2024-10-31 15:04:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 15:04:51,460 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:04:51,460 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] [2024-10-31 15:04:51,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 15:04:51,461 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:04:51,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:04:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-10-31 15:04:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:04:51,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266357597] [2024-10-31 15:04:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:04:51,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:00,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:05:00,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:05,752 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 15:05:05,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:05:06,019 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266357597] [2024-10-31 15:05:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266357597] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:05:06,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:05:06,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-10-31 15:05:06,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143095964] [2024-10-31 15:05:06,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:06,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:05:06,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:05:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2024-10-31 15:05:06,021 INFO L87 Difference]: Start difference. First operand 108 states and 143 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:05:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:08,272 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2024-10-31 15:05:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 15:05:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-31 15:05:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:08,273 INFO L225 Difference]: With dead ends: 122 [2024-10-31 15:05:08,273 INFO L226 Difference]: Without dead ends: 120 [2024-10-31 15:05:08,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=88, Invalid=291, Unknown=1, NotChecked=0, Total=380 [2024-10-31 15:05:08,274 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:08,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 467 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 15:05:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-31 15:05:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2024-10-31 15:05:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 87 states have internal predecessors, (98), 18 states have call successors, (18), 8 states have call predecessors, (18), 12 states have return successors, (32), 17 states have call predecessors, (32), 16 states have call successors, (32) [2024-10-31 15:05:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2024-10-31 15:05:08,282 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 49 [2024-10-31 15:05:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:08,283 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2024-10-31 15:05:08,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:05:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2024-10-31 15:05:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:05:08,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:08,283 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] [2024-10-31 15:05:08,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 15:05:08,284 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:08,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2024-10-31 15:05:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577972305] [2024-10-31 15:05:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:08,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 15:05:08,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:05:08,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 15:05:08,761 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:08,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577972305] [2024-10-31 15:05:08,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [577972305] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:08,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:08,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2024-10-31 15:05:08,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989111135] [2024-10-31 15:05:08,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:08,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 15:05:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 15:05:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2024-10-31 15:05:08,762 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-31 15:05:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:09,171 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2024-10-31 15:05:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 15:05:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2024-10-31 15:05:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:09,173 INFO L225 Difference]: With dead ends: 140 [2024-10-31 15:05:09,173 INFO L226 Difference]: Without dead ends: 113 [2024-10-31 15:05:09,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-10-31 15:05:09,174 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:09,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1104 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:05:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-31 15:05:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2024-10-31 15:05:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 75 states have internal predecessors, (86), 16 states have call successors, (16), 6 states have call predecessors, (16), 10 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2024-10-31 15:05:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2024-10-31 15:05:09,192 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 50 [2024-10-31 15:05:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:09,192 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2024-10-31 15:05:09,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-31 15:05:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2024-10-31 15:05:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 15:05:09,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:09,198 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2024-10-31 15:05:09,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 15:05:09,198 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:09,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash -477005395, now seen corresponding path program 1 times [2024-10-31 15:05:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:09,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982347560] [2024-10-31 15:05:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:09,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:09,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 15:05:09,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 15:05:09,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 15:05:09,344 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982347560] [2024-10-31 15:05:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [982347560] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:09,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:09,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-10-31 15:05:09,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947794281] [2024-10-31 15:05:09,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:09,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:05:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:05:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:05:09,346 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:09,401 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2024-10-31 15:05:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2024-10-31 15:05:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:09,402 INFO L225 Difference]: With dead ends: 145 [2024-10-31 15:05:09,402 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 15:05:09,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 15:05:09,403 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:09,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 493 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 15:05:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 15:05:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-10-31 15:05:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-10-31 15:05:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-10-31 15:05:09,409 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 54 [2024-10-31 15:05:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:09,409 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-10-31 15:05:09,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-10-31 15:05:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 15:05:09,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:09,410 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] [2024-10-31 15:05:09,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 15:05:09,410 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:09,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2024-10-31 15:05:09,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862545002] [2024-10-31 15:05:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:26,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 15:05:26,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:49,165 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 15:05:49,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 15:05:53,327 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862545002] [2024-10-31 15:05:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862545002] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 15:05:53,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 15:05:53,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2024-10-31 15:05:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537606462] [2024-10-31 15:05:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:53,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 15:05:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 15:05:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=291, Unknown=5, NotChecked=0, Total=380 [2024-10-31 15:05:53,328 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:05:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:53,791 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2024-10-31 15:05:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 15:05:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-31 15:05:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:53,792 INFO L225 Difference]: With dead ends: 98 [2024-10-31 15:05:53,792 INFO L226 Difference]: Without dead ends: 94 [2024-10-31 15:05:53,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=100, Invalid=357, Unknown=5, NotChecked=0, Total=462 [2024-10-31 15:05:53,793 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 21 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:53,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 416 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 15:05:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-31 15:05:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2024-10-31 15:05:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-31 15:05:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2024-10-31 15:05:53,798 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 50 [2024-10-31 15:05:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:53,799 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2024-10-31 15:05:53,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 15:05:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2024-10-31 15:05:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 15:05:53,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:53,799 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2024-10-31 15:05:53,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 15:05:53,800 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:53,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2024-10-31 15:05:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58714791] [2024-10-31 15:05:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:53,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 15:05:53,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:53,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:54,080 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58714791] [2024-10-31 15:05:54,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [58714791] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:54,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:54,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 15:05:54,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112571666] [2024-10-31 15:05:54,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:54,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:05:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:05:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:05:54,081 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 15:05:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:54,313 INFO L93 Difference]: Finished difference Result 111 states and 164 transitions. [2024-10-31 15:05:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-10-31 15:05:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:54,314 INFO L225 Difference]: With dead ends: 111 [2024-10-31 15:05:54,314 INFO L226 Difference]: Without dead ends: 98 [2024-10-31 15:05:54,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-10-31 15:05:54,315 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:54,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 442 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-31 15:05:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2024-10-31 15:05:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-31 15:05:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2024-10-31 15:05:54,322 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 54 [2024-10-31 15:05:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:54,323 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2024-10-31 15:05:54,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 15:05:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2024-10-31 15:05:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 15:05:54,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:54,325 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2024-10-31 15:05:54,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 15:05:54,325 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:54,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1756521076, now seen corresponding path program 2 times [2024-10-31 15:05:54,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:54,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998616691] [2024-10-31 15:05:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:54,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 15:05:54,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 15:05:54,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:54,837 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998616691] [2024-10-31 15:05:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [998616691] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:54,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:54,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2024-10-31 15:05:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136113236] [2024-10-31 15:05:54,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:54,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 15:05:54,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 15:05:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-31 15:05:54,839 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:05:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:55,169 INFO L93 Difference]: Finished difference Result 116 states and 169 transitions. [2024-10-31 15:05:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 15:05:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-10-31 15:05:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:55,171 INFO L225 Difference]: With dead ends: 116 [2024-10-31 15:05:55,171 INFO L226 Difference]: Without dead ends: 107 [2024-10-31 15:05:55,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-31 15:05:55,172 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 27 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:55,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 832 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-31 15:05:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2024-10-31 15:05:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 81 states have internal predecessors, (91), 14 states have call successors, (14), 5 states have call predecessors, (14), 12 states have return successors, (47), 15 states have call predecessors, (47), 13 states have call successors, (47) [2024-10-31 15:05:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 152 transitions. [2024-10-31 15:05:55,182 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 152 transitions. Word has length 54 [2024-10-31 15:05:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:55,182 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 152 transitions. [2024-10-31 15:05:55,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 15:05:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 152 transitions. [2024-10-31 15:05:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 15:05:55,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:55,183 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1] [2024-10-31 15:05:55,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 15:05:55,183 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:55,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-10-31 15:05:55,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:55,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875344434] [2024-10-31 15:05:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:55,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:55,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:05:55,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:55,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:55,478 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:55,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875344434] [2024-10-31 15:05:55,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [875344434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:55,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:55,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 15:05:55,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708572303] [2024-10-31 15:05:55,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:55,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:05:55,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:05:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:05:55,479 INFO L87 Difference]: Start difference. First operand 102 states and 152 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:55,639 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2024-10-31 15:05:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-10-31 15:05:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:55,641 INFO L225 Difference]: With dead ends: 111 [2024-10-31 15:05:55,641 INFO L226 Difference]: Without dead ends: 98 [2024-10-31 15:05:55,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:05:55,641 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 22 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:55,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 367 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-31 15:05:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-10-31 15:05:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2024-10-31 15:05:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2024-10-31 15:05:55,648 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 63 [2024-10-31 15:05:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:55,648 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2024-10-31 15:05:55,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2024-10-31 15:05:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 15:05:55,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:55,649 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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 15:05:55,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 15:05:55,649 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:55,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2024-10-31 15:05:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481036235] [2024-10-31 15:05:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:55,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:55,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 15:05:55,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:55,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:55,965 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:55,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481036235] [2024-10-31 15:05:55,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [481036235] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:55,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:55,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 15:05:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681312091] [2024-10-31 15:05:55,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:55,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:05:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:55,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:05:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:05:55,966 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:56,169 INFO L93 Difference]: Finished difference Result 109 states and 154 transitions. [2024-10-31 15:05:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-10-31 15:05:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:56,174 INFO L225 Difference]: With dead ends: 109 [2024-10-31 15:05:56,174 INFO L226 Difference]: Without dead ends: 95 [2024-10-31 15:05:56,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-10-31 15:05:56,175 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:56,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 391 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-31 15:05:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-10-31 15:05:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-31 15:05:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-10-31 15:05:56,190 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 63 [2024-10-31 15:05:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:56,190 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-10-31 15:05:56,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-10-31 15:05:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 15:05:56,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:56,191 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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 15:05:56,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 15:05:56,191 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:56,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -942967955, now seen corresponding path program 1 times [2024-10-31 15:05:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921591911] [2024-10-31 15:05:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:56,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 15:05:56,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:56,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:56,663 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921591911] [2024-10-31 15:05:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [921591911] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:56,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2024-10-31 15:05:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291777380] [2024-10-31 15:05:56,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:56,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 15:05:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 15:05:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-10-31 15:05:56,668 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 15:05:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:56,951 INFO L93 Difference]: Finished difference Result 111 states and 153 transitions. [2024-10-31 15:05:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 15:05:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-10-31 15:05:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:56,953 INFO L225 Difference]: With dead ends: 111 [2024-10-31 15:05:56,953 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 15:05:56,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-10-31 15:05:56,954 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 22 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:56,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 595 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 15:05:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 15:05:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2024-10-31 15:05:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-10-31 15:05:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-10-31 15:05:56,973 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 63 [2024-10-31 15:05:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:56,973 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-10-31 15:05:56,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 15:05:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-10-31 15:05:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 15:05:56,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:56,974 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1] [2024-10-31 15:05:56,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 15:05:56,974 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:56,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-10-31 15:05:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868723590] [2024-10-31 15:05:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:56,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:57,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 15:05:57,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:57,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 15:05:57,256 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868723590] [2024-10-31 15:05:57,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868723590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 15:05:57,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 15:05:57,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 15:05:57,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251968727] [2024-10-31 15:05:57,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 15:05:57,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:05:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:05:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:05:57,261 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:57,404 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2024-10-31 15:05:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 15:05:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-10-31 15:05:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:57,406 INFO L225 Difference]: With dead ends: 106 [2024-10-31 15:05:57,406 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 15:05:57,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 15:05:57,406 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 27 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:57,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 461 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 15:05:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2024-10-31 15:05:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-31 15:05:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-10-31 15:05:57,412 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 65 [2024-10-31 15:05:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:57,412 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-10-31 15:05:57,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 15:05:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-10-31 15:05:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 15:05:57,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:57,413 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 15:05:57,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 15:05:57,413 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:57,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1951422266, now seen corresponding path program 1 times [2024-10-31 15:05:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:57,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662300663] [2024-10-31 15:05:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:05:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:05:57,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 15:05:57,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:05:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-31 15:05:57,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:05:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 15:05:57,817 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:05:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662300663] [2024-10-31 15:05:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662300663] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:05:57,817 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:05:57,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 9 [2024-10-31 15:05:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015687794] [2024-10-31 15:05:57,817 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:05:57,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 15:05:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:05:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 15:05:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:05:57,818 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 15:05:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:05:57,968 INFO L93 Difference]: Finished difference Result 114 states and 166 transitions. [2024-10-31 15:05:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 15:05:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 72 [2024-10-31 15:05:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:05:57,972 INFO L225 Difference]: With dead ends: 114 [2024-10-31 15:05:57,972 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 15:05:57,972 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 15:05:57,973 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:05:57,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 316 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:05:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 15:05:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2024-10-31 15:05:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 75 states have internal predecessors, (84), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2024-10-31 15:05:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2024-10-31 15:05:57,986 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 72 [2024-10-31 15:05:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:05:57,986 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2024-10-31 15:05:57,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 15:05:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2024-10-31 15:05:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 15:05:57,987 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:05:57,990 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 15:05:57,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-31 15:05:57,990 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:05:57,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:05:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2024-10-31 15:05:57,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:05:57,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162533061] [2024-10-31 15:05:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:05:57,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms