/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 02:03:23,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 02:03:23,664 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 02:03:23,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 02:03:23,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 02:03:23,699 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 02:03:23,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 02:03:23,700 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 02:03:23,701 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 02:03:23,702 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 02:03:23,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 02:03:23,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 02:03:23,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 02:03:23,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 02:03:23,705 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 02:03:23,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 02:03:23,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 02:03:23,705 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 02:03:23,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 02:03:23,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 02:03:23,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 02:03:23,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 02:03:23,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 02:03:23,710 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 02:03:23,710 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 02:03:23,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 02:03:23,710 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 02:03:23,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 02:03:23,711 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 02:03:23,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 02:03:23,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 02:03:23,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 02:03:23,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 02:03:23,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 02:03:23,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:23,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 02:03:23,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 02:03:23,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 02:03:23,713 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 02:03:23,713 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:23,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 02:03:23,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 02:03:23,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 02:03:23,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 02:03:23,714 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:23,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 02:03:23,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 02:03:23,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 02:03:23,968 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 02:03:23,968 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 02:03:23,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-11-03 02:03:25,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 02:03:25,765 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 02:03:25,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-11-03 02:03:25,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2049dd32d/58e667b425804da183ce103d74a574f2/FLAG545f9cbfb [2024-11-03 02:03:26,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2049dd32d/58e667b425804da183ce103d74a574f2 [2024-11-03 02:03:26,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 02:03:26,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 02:03:26,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:26,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 02:03:26,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 02:03:26,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea09310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26, skipping insertion in model container [2024-11-03 02:03:26,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 02:03:26,326 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-03 02:03:26,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:26,389 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 02:03:26,401 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-03 02:03:26,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:26,446 INFO L204 MainTranslator]: Completed translation [2024-11-03 02:03:26,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26 WrapperNode [2024-11-03 02:03:26,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:26,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:26,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 02:03:26,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 02:03:26,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,482 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-11-03 02:03:26,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:26,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 02:03:26,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 02:03:26,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 02:03:26,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,517 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-03 02:03:26,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,523 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 02:03:26,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 02:03:26,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 02:03:26,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 02:03:26,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (1/1) ... [2024-11-03 02:03:26,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 02:03:26,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-03 02:03:26,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-03 02:03:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 02:03:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 02:03:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-03 02:03:26,616 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-03 02:03:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 02:03:26,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 02:03:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-03 02:03:26,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-03 02:03:26,736 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 02:03:26,738 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 02:03:27,116 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-03 02:03:27,116 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 02:03:27,132 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 02:03:27,132 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-03 02:03:27,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:27 BoogieIcfgContainer [2024-11-03 02:03:27,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 02:03:27,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 02:03:27,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 02:03:27,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 02:03:27,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:03:26" (1/3) ... [2024-11-03 02:03:27,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605b755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:27, skipping insertion in model container [2024-11-03 02:03:27,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:26" (2/3) ... [2024-11-03 02:03:27,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605b755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:27, skipping insertion in model container [2024-11-03 02:03:27,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:27" (3/3) ... [2024-11-03 02:03:27,140 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-11-03 02:03:27,155 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 02:03:27,156 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 02:03:27,202 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 02:03:27,208 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;@1f7c574f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 02:03:27,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 02:03:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:03:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-03 02:03:27,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:27,219 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:27,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:27,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2024-11-03 02:03:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087907880] [2024-11-03 02:03:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:27,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:27,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 02:03:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:27,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:27,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:27,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:27,619 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087907880] [2024-11-03 02:03:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087907880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:27,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:27,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-03 02:03:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624208124] [2024-11-03 02:03:27,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:27,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:03:27,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:03:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:27,650 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:27,914 INFO L93 Difference]: Finished difference Result 175 states and 288 transitions. [2024-11-03 02:03:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-03 02:03:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:27,931 INFO L225 Difference]: With dead ends: 175 [2024-11-03 02:03:27,931 INFO L226 Difference]: Without dead ends: 100 [2024-11-03 02:03:27,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:27,938 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:27,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 623 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-03 02:03:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-03 02:03:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 86 states have internal predecessors, (122), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-03 02:03:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 147 transitions. [2024-11-03 02:03:27,981 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 147 transitions. Word has length 32 [2024-11-03 02:03:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:27,982 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 147 transitions. [2024-11-03 02:03:27,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 147 transitions. [2024-11-03 02:03:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-03 02:03:27,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:27,985 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:27,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-03 02:03:28,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:28,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:28,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1139634014, now seen corresponding path program 1 times [2024-11-03 02:03:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:28,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785377875] [2024-11-03 02:03:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:28,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:28,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 02:03:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:28,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:28,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:28,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:28,409 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:28,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785377875] [2024-11-03 02:03:28,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785377875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:28,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:28,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-03 02:03:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724176129] [2024-11-03 02:03:28,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:28,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:28,415 INFO L87 Difference]: Start difference. First operand 98 states and 147 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:28,499 INFO L93 Difference]: Finished difference Result 181 states and 277 transitions. [2024-11-03 02:03:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-11-03 02:03:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:28,506 INFO L225 Difference]: With dead ends: 181 [2024-11-03 02:03:28,506 INFO L226 Difference]: Without dead ends: 116 [2024-11-03 02:03:28,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:28,508 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 5 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:28,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 492 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-03 02:03:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2024-11-03 02:03:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 97 states have internal predecessors, (136), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-03 02:03:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2024-11-03 02:03:28,531 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 36 [2024-11-03 02:03:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:28,531 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2024-11-03 02:03:28,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2024-11-03 02:03:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-03 02:03:28,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:28,538 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:28,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 02:03:28,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:28,739 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:28,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1018252548, now seen corresponding path program 1 times [2024-11-03 02:03:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765795298] [2024-11-03 02:03:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:28,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:28,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 02:03:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:28,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:28,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:28,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:28,924 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765795298] [2024-11-03 02:03:28,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765795298] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:28,925 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:28,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-11-03 02:03:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22369913] [2024-11-03 02:03:28,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:28,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:28,927 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:29,018 INFO L93 Difference]: Finished difference Result 250 states and 374 transitions. [2024-11-03 02:03:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-03 02:03:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:29,020 INFO L225 Difference]: With dead ends: 250 [2024-11-03 02:03:29,020 INFO L226 Difference]: Without dead ends: 189 [2024-11-03 02:03:29,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:29,022 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 46 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:29,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 435 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-03 02:03:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-11-03 02:03:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2024-11-03 02:03:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 275 transitions. [2024-11-03 02:03:29,040 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 275 transitions. Word has length 40 [2024-11-03 02:03:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:29,041 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 275 transitions. [2024-11-03 02:03:29,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 275 transitions. [2024-11-03 02:03:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-03 02:03:29,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:29,043 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, 1, 1, 1, 1, 1] [2024-11-03 02:03:29,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-03 02:03:29,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:29,245 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:29,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -338194178, now seen corresponding path program 1 times [2024-11-03 02:03:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167253733] [2024-11-03 02:03:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:29,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:29,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-03 02:03:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:29,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:29,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:29,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:29,475 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167253733] [2024-11-03 02:03:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167253733] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:29,475 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2024-11-03 02:03:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830990781] [2024-11-03 02:03:29,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:29,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 02:03:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 02:03:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:29,482 INFO L87 Difference]: Start difference. First operand 187 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:29,599 INFO L93 Difference]: Finished difference Result 235 states and 344 transitions. [2024-11-03 02:03:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:03:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-03 02:03:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:29,603 INFO L225 Difference]: With dead ends: 235 [2024-11-03 02:03:29,604 INFO L226 Difference]: Without dead ends: 180 [2024-11-03 02:03:29,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:29,607 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 33 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:29,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-03 02:03:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-11-03 02:03:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-03 02:03:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2024-11-03 02:03:29,632 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2024-11-03 02:03:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:29,632 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2024-11-03 02:03:29,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2024-11-03 02:03:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-03 02:03:29,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:29,638 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:29,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-03 02:03:29,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:29,839 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:29,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2024-11-03 02:03:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363096422] [2024-11-03 02:03:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:29,840 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:29,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:29,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-03 02:03:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:29,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-03 02:03:29,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:29,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:30,052 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:30,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363096422] [2024-11-03 02:03:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363096422] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:30,053 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:30,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 02:03:30,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638615747] [2024-11-03 02:03:30,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:30,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:03:30,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:03:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:30,055 INFO L87 Difference]: Start difference. First operand 178 states and 258 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:30,306 INFO L93 Difference]: Finished difference Result 294 states and 436 transitions. [2024-11-03 02:03:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:03:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-03 02:03:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:30,309 INFO L225 Difference]: With dead ends: 294 [2024-11-03 02:03:30,309 INFO L226 Difference]: Without dead ends: 240 [2024-11-03 02:03:30,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:30,311 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:30,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 602 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-03 02:03:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 186. [2024-11-03 02:03:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 161 states have (on average 1.3788819875776397) internal successors, (222), 160 states have internal predecessors, (222), 21 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (27), 27 states have call predecessors, (27), 20 states have call successors, (27) [2024-11-03 02:03:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2024-11-03 02:03:30,331 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 43 [2024-11-03 02:03:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:30,332 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2024-11-03 02:03:30,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2024-11-03 02:03:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-03 02:03:30,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:30,334 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:30,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-03 02:03:30,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:30,537 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:30,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2024816019, now seen corresponding path program 1 times [2024-11-03 02:03:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:30,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340759505] [2024-11-03 02:03:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:30,538 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:30,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:30,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:30,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-03 02:03:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:30,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:30,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:30,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:30,682 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340759505] [2024-11-03 02:03:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340759505] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:30,683 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:30,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 02:03:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868618048] [2024-11-03 02:03:30,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:30,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:30,684 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:30,729 INFO L93 Difference]: Finished difference Result 348 states and 507 transitions. [2024-11-03 02:03:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-03 02:03:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:30,732 INFO L225 Difference]: With dead ends: 348 [2024-11-03 02:03:30,732 INFO L226 Difference]: Without dead ends: 272 [2024-11-03 02:03:30,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:30,733 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 30 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:30,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 553 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-03 02:03:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2024-11-03 02:03:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 238 states have internal predecessors, (319), 25 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-03 02:03:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2024-11-03 02:03:30,747 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 43 [2024-11-03 02:03:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:30,747 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2024-11-03 02:03:30,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2024-11-03 02:03:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 02:03:30,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:30,749 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:30,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-03 02:03:30,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:30,950 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:30,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:30,950 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2024-11-03 02:03:30,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467475101] [2024-11-03 02:03:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:30,950 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:30,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-03 02:03:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:31,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:03:31,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:31,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:31,082 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:31,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467475101] [2024-11-03 02:03:31,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467475101] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:31,082 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:31,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-03 02:03:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329847135] [2024-11-03 02:03:31,083 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:31,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:03:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:03:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:31,084 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:31,115 INFO L93 Difference]: Finished difference Result 276 states and 381 transitions. [2024-11-03 02:03:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-03 02:03:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:31,117 INFO L225 Difference]: With dead ends: 276 [2024-11-03 02:03:31,117 INFO L226 Difference]: Without dead ends: 269 [2024-11-03 02:03:31,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:31,118 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 6 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:31,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 482 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-03 02:03:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2024-11-03 02:03:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 238 states have internal predecessors, (316), 25 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-03 02:03:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 372 transitions. [2024-11-03 02:03:31,134 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 372 transitions. Word has length 44 [2024-11-03 02:03:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:31,135 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 372 transitions. [2024-11-03 02:03:31,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 372 transitions. [2024-11-03 02:03:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 02:03:31,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:31,137 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:31,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-03 02:03:31,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:31,339 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:31,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2024-11-03 02:03:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:31,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243174340] [2024-11-03 02:03:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:31,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:31,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:31,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-03 02:03:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:31,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 02:03:31,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 02:03:31,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 02:03:31,562 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243174340] [2024-11-03 02:03:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243174340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:31,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-03 02:03:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115647137] [2024-11-03 02:03:31,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:31,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-03 02:03:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-03 02:03:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:31,564 INFO L87 Difference]: Start difference. First operand 269 states and 372 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:31,736 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2024-11-03 02:03:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-03 02:03:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-03 02:03:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:31,739 INFO L225 Difference]: With dead ends: 350 [2024-11-03 02:03:31,739 INFO L226 Difference]: Without dead ends: 311 [2024-11-03 02:03:31,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-03 02:03:31,740 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 18 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:31,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 808 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-03 02:03:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 267. [2024-11-03 02:03:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 238 states have (on average 1.319327731092437) internal successors, (314), 236 states have internal predecessors, (314), 25 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-03 02:03:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 370 transitions. [2024-11-03 02:03:31,751 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 370 transitions. Word has length 44 [2024-11-03 02:03:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:31,752 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 370 transitions. [2024-11-03 02:03:31,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 370 transitions. [2024-11-03 02:03:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 02:03:31,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:31,753 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:31,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-03 02:03:31,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:31,954 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:31,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 1 times [2024-11-03 02:03:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686023806] [2024-11-03 02:03:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:31,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:31,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:31,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:31,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-03 02:03:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:32,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:32,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:32,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:32,251 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686023806] [2024-11-03 02:03:32,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686023806] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:32,252 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:32,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 02:03:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362262076] [2024-11-03 02:03:32,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:32,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:03:32,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:03:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:32,253 INFO L87 Difference]: Start difference. First operand 267 states and 370 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:33,127 INFO L93 Difference]: Finished difference Result 273 states and 375 transitions. [2024-11-03 02:03:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:03:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-03 02:03:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:33,129 INFO L225 Difference]: With dead ends: 273 [2024-11-03 02:03:33,129 INFO L226 Difference]: Without dead ends: 271 [2024-11-03 02:03:33,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:33,130 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:33,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 460 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-03 02:03:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-03 02:03:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2024-11-03 02:03:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 241 states have (on average 1.3153526970954357) internal successors, (317), 239 states have internal predecessors, (317), 25 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-03 02:03:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 373 transitions. [2024-11-03 02:03:33,143 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 373 transitions. Word has length 44 [2024-11-03 02:03:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:33,143 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 373 transitions. [2024-11-03 02:03:33,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 373 transitions. [2024-11-03 02:03:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-03 02:03:33,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:33,145 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:33,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-03 02:03:33,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:33,345 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:33,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:33,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2034112790, now seen corresponding path program 1 times [2024-11-03 02:03:33,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:33,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139364] [2024-11-03 02:03:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:33,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:33,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:33,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-03 02:03:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:33,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:33,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:33,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:33,493 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:33,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139364] [2024-11-03 02:03:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [139364] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:33,493 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:33,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 02:03:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299880387] [2024-11-03 02:03:33,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:33,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:03:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:03:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:33,495 INFO L87 Difference]: Start difference. First operand 271 states and 373 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:33,554 INFO L93 Difference]: Finished difference Result 579 states and 792 transitions. [2024-11-03 02:03:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:03:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-11-03 02:03:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:33,558 INFO L225 Difference]: With dead ends: 579 [2024-11-03 02:03:33,558 INFO L226 Difference]: Without dead ends: 518 [2024-11-03 02:03:33,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:03:33,559 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 56 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:33,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 394 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-03 02:03:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 290. [2024-11-03 02:03:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 259 states have (on average 1.3204633204633205) internal successors, (342), 256 states have internal predecessors, (342), 26 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (32), 32 states have call predecessors, (32), 25 states have call successors, (32) [2024-11-03 02:03:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2024-11-03 02:03:33,577 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 47 [2024-11-03 02:03:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:33,577 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2024-11-03 02:03:33,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2024-11-03 02:03:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-03 02:03:33,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:33,578 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:33,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-03 02:03:33,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:33,779 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:33,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2024-11-03 02:03:33,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:33,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704991974] [2024-11-03 02:03:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:33,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:33,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:33,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:33,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-03 02:03:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:33,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:33,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:33,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:33,892 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:33,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704991974] [2024-11-03 02:03:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [704991974] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:33,892 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 02:03:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932506966] [2024-11-03 02:03:33,892 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:33,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:33,894 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:33,913 INFO L93 Difference]: Finished difference Result 303 states and 414 transitions. [2024-11-03 02:03:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:03:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-03 02:03:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:33,915 INFO L225 Difference]: With dead ends: 303 [2024-11-03 02:03:33,915 INFO L226 Difference]: Without dead ends: 219 [2024-11-03 02:03:33,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:33,916 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:33,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-03 02:03:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2024-11-03 02:03:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 188 states have (on average 1.3191489361702127) internal successors, (248), 189 states have internal predecessors, (248), 26 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (27), 27 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-03 02:03:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 301 transitions. [2024-11-03 02:03:33,929 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 301 transitions. Word has length 48 [2024-11-03 02:03:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:33,929 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 301 transitions. [2024-11-03 02:03:33,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 301 transitions. [2024-11-03 02:03:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 02:03:33,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:33,931 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, 1] [2024-11-03 02:03:33,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2024-11-03 02:03:34,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:34,132 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:34,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:34,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2024-11-03 02:03:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:34,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691365726] [2024-11-03 02:03:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:34,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:34,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:34,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-03 02:03:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:34,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-03 02:03:34,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:34,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:34,261 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691365726] [2024-11-03 02:03:34,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [691365726] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:34,261 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:34,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2024-11-03 02:03:34,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457550435] [2024-11-03 02:03:34,262 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:34,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-03 02:03:34,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-03 02:03:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-03 02:03:34,263 INFO L87 Difference]: Start difference. First operand 219 states and 301 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:34,372 INFO L93 Difference]: Finished difference Result 281 states and 388 transitions. [2024-11-03 02:03:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-03 02:03:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:34,374 INFO L225 Difference]: With dead ends: 281 [2024-11-03 02:03:34,374 INFO L226 Difference]: Without dead ends: 239 [2024-11-03 02:03:34,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:03:34,375 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 50 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:34,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 407 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-03 02:03:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2024-11-03 02:03:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 188 states have (on average 1.3085106382978724) internal successors, (246), 189 states have internal predecessors, (246), 26 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (27), 27 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-03 02:03:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 299 transitions. [2024-11-03 02:03:34,388 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 299 transitions. Word has length 49 [2024-11-03 02:03:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:34,389 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 299 transitions. [2024-11-03 02:03:34,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 299 transitions. [2024-11-03 02:03:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-03 02:03:34,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:34,390 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:34,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-03 02:03:34,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:34,590 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:34,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2024-11-03 02:03:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211090333] [2024-11-03 02:03:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:34,591 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:34,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:34,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-03 02:03:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:34,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:34,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:34,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:34,831 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211090333] [2024-11-03 02:03:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [211090333] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:34,832 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-11-03 02:03:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83089534] [2024-11-03 02:03:34,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:34,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-03 02:03:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-03 02:03:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-03 02:03:34,833 INFO L87 Difference]: Start difference. First operand 219 states and 299 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:35,388 INFO L93 Difference]: Finished difference Result 355 states and 486 transitions. [2024-11-03 02:03:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-03 02:03:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-03 02:03:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:35,393 INFO L225 Difference]: With dead ends: 355 [2024-11-03 02:03:35,393 INFO L226 Difference]: Without dead ends: 330 [2024-11-03 02:03:35,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-11-03 02:03:35,394 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 75 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:35,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 596 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-03 02:03:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-03 02:03:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 294. [2024-11-03 02:03:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 255 states have (on average 1.2862745098039217) internal successors, (328), 258 states have internal predecessors, (328), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2024-11-03 02:03:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 397 transitions. [2024-11-03 02:03:35,414 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 397 transitions. Word has length 50 [2024-11-03 02:03:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:35,415 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 397 transitions. [2024-11-03 02:03:35,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 397 transitions. [2024-11-03 02:03:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-03 02:03:35,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:35,416 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, 1, 1, 1] [2024-11-03 02:03:35,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-03 02:03:35,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:35,618 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:35,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1555222541, now seen corresponding path program 1 times [2024-11-03 02:03:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658729643] [2024-11-03 02:03:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:35,621 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:35,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-03 02:03:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:35,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 02:03:35,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:35,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:35,733 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:35,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658729643] [2024-11-03 02:03:35,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [658729643] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:35,733 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:35,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 02:03:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518178685] [2024-11-03 02:03:35,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:35,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:35,734 INFO L87 Difference]: Start difference. First operand 294 states and 397 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:35,813 INFO L93 Difference]: Finished difference Result 412 states and 541 transitions. [2024-11-03 02:03:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:03:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-03 02:03:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:35,816 INFO L225 Difference]: With dead ends: 412 [2024-11-03 02:03:35,816 INFO L226 Difference]: Without dead ends: 394 [2024-11-03 02:03:35,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-03 02:03:35,818 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 40 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:35,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 313 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-03 02:03:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 294. [2024-11-03 02:03:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 255 states have (on average 1.2823529411764707) internal successors, (327), 258 states have internal predecessors, (327), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2024-11-03 02:03:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 396 transitions. [2024-11-03 02:03:35,836 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 396 transitions. Word has length 51 [2024-11-03 02:03:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:35,836 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 396 transitions. [2024-11-03 02:03:35,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 396 transitions. [2024-11-03 02:03:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-03 02:03:35,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:35,838 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:35,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-03 02:03:36,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,040 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:36,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2024-11-03 02:03:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128502201] [2024-11-03 02:03:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:36,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:36,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-03 02:03:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:36,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:03:36,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:36,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:36,140 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:36,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128502201] [2024-11-03 02:03:36,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [128502201] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:36,140 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:36,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 02:03:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858631346] [2024-11-03 02:03:36,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:36,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:03:36,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:03:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:36,142 INFO L87 Difference]: Start difference. First operand 294 states and 396 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:36,162 INFO L93 Difference]: Finished difference Result 303 states and 404 transitions. [2024-11-03 02:03:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 02:03:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-03 02:03:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:36,164 INFO L225 Difference]: With dead ends: 303 [2024-11-03 02:03:36,164 INFO L226 Difference]: Without dead ends: 237 [2024-11-03 02:03:36,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 02:03:36,165 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:36,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-03 02:03:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 211. [2024-11-03 02:03:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 180 states have (on average 1.2944444444444445) internal successors, (233), 184 states have internal predecessors, (233), 26 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 02:03:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 284 transitions. [2024-11-03 02:03:36,177 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 284 transitions. Word has length 52 [2024-11-03 02:03:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:36,177 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 284 transitions. [2024-11-03 02:03:36,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 284 transitions. [2024-11-03 02:03:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-03 02:03:36,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:36,178 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:36,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-03 02:03:36,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,379 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:36,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2024-11-03 02:03:36,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:36,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504860384] [2024-11-03 02:03:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:36,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:36,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-03 02:03:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:36,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:36,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:36,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:36,970 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504860384] [2024-11-03 02:03:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [504860384] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:36,970 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:36,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-11-03 02:03:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086515593] [2024-11-03 02:03:36,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:36,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 02:03:36,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 02:03:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:36,972 INFO L87 Difference]: Start difference. First operand 211 states and 284 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:37,170 INFO L93 Difference]: Finished difference Result 225 states and 301 transitions. [2024-11-03 02:03:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2024-11-03 02:03:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:37,172 INFO L225 Difference]: With dead ends: 225 [2024-11-03 02:03:37,172 INFO L226 Difference]: Without dead ends: 223 [2024-11-03 02:03:37,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-03 02:03:37,173 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 9 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:37,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 764 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-03 02:03:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2024-11-03 02:03:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 183 states have (on average 1.289617486338798) internal successors, (236), 187 states have internal predecessors, (236), 26 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 02:03:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 287 transitions. [2024-11-03 02:03:37,187 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 287 transitions. Word has length 54 [2024-11-03 02:03:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:37,187 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 287 transitions. [2024-11-03 02:03:37,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 287 transitions. [2024-11-03 02:03:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-03 02:03:37,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:37,188 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:37,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-03 02:03:37,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:37,389 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:37,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2024-11-03 02:03:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335885665] [2024-11-03 02:03:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:37,390 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:37,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:37,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-03 02:03:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:37,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:37,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:37,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:37,696 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335885665] [2024-11-03 02:03:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [335885665] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:37,696 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-11-03 02:03:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176864098] [2024-11-03 02:03:37,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:37,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-03 02:03:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-03 02:03:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-03 02:03:37,698 INFO L87 Difference]: Start difference. First operand 215 states and 287 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:38,033 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2024-11-03 02:03:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-03 02:03:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2024-11-03 02:03:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:38,035 INFO L225 Difference]: With dead ends: 327 [2024-11-03 02:03:38,035 INFO L226 Difference]: Without dead ends: 292 [2024-11-03 02:03:38,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-03 02:03:38,036 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 73 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:38,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 515 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 02:03:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-03 02:03:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 225. [2024-11-03 02:03:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 193 states have (on average 1.2849740932642486) internal successors, (248), 196 states have internal predecessors, (248), 26 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 02:03:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 299 transitions. [2024-11-03 02:03:38,053 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 299 transitions. Word has length 58 [2024-11-03 02:03:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:38,053 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 299 transitions. [2024-11-03 02:03:38,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 299 transitions. [2024-11-03 02:03:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-03 02:03:38,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:38,055 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:38,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:38,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:38,257 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:38,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2024-11-03 02:03:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940011645] [2024-11-03 02:03:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:38,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:38,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-03 02:03:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:38,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:38,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:38,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:03:38,458 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:38,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940011645] [2024-11-03 02:03:38,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [940011645] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:38,458 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:38,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 02:03:38,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980026092] [2024-11-03 02:03:38,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:38,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:03:38,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:38,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:03:38,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:38,462 INFO L87 Difference]: Start difference. First operand 225 states and 299 transitions. Second operand has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:38,519 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2024-11-03 02:03:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:03:38,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-03 02:03:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:38,520 INFO L225 Difference]: With dead ends: 250 [2024-11-03 02:03:38,521 INFO L226 Difference]: Without dead ends: 248 [2024-11-03 02:03:38,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:38,521 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 44 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:38,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 526 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-03 02:03:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 229. [2024-11-03 02:03:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 196 states have (on average 1.280612244897959) internal successors, (251), 199 states have internal predecessors, (251), 26 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 02:03:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 302 transitions. [2024-11-03 02:03:38,535 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 302 transitions. Word has length 60 [2024-11-03 02:03:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:38,535 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 302 transitions. [2024-11-03 02:03:38,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 02:03:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 302 transitions. [2024-11-03 02:03:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-03 02:03:38,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:38,536 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2024-11-03 02:03:38,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:38,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:38,737 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:38,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2024-11-03 02:03:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584176621] [2024-11-03 02:03:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:38,738 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:38,740 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:03:38,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-03 02:03:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:38,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-03 02:03:38,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:40,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:41,724 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:41,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584176621] [2024-11-03 02:03:41,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584176621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:41,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:41,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-03 02:03:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093186528] [2024-11-03 02:03:41,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:41,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-03 02:03:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-03 02:03:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-03 02:03:41,726 INFO L87 Difference]: Start difference. First operand 229 states and 302 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 02:04:01,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-11-03 02:04:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:21,365 INFO L93 Difference]: Finished difference Result 389 states and 512 transitions. [2024-11-03 02:04:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-03 02:04:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2024-11-03 02:04:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:21,368 INFO L225 Difference]: With dead ends: 389 [2024-11-03 02:04:21,368 INFO L226 Difference]: Without dead ends: 353 [2024-11-03 02:04:21,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2024-11-03 02:04:21,370 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 102 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:21,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1207 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1056 Invalid, 1 Unknown, 0 Unchecked, 19.3s Time] [2024-11-03 02:04:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-03 02:04:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 285. [2024-11-03 02:04:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 244 states have (on average 1.2704918032786885) internal successors, (310), 248 states have internal predecessors, (310), 34 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2024-11-03 02:04:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 377 transitions. [2024-11-03 02:04:21,394 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 377 transitions. Word has length 65 [2024-11-03 02:04:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:21,394 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 377 transitions. [2024-11-03 02:04:21,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 02:04:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 377 transitions. [2024-11-03 02:04:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-03 02:04:21,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:21,396 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2024-11-03 02:04:21,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-03 02:04:21,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:21,597 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:21,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2024-11-03 02:04:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449101047] [2024-11-03 02:04:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:21,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:21,599 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-03 02:04:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:21,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-03 02:04:21,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 02:04:22,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 02:04:24,336 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449101047] [2024-11-03 02:04:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [449101047] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:24,336 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-11-03 02:04:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002742651] [2024-11-03 02:04:24,336 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:24,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 02:04:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 02:04:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:04:24,337 INFO L87 Difference]: Start difference. First operand 285 states and 377 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 02:04:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:32,375 INFO L93 Difference]: Finished difference Result 372 states and 485 transitions. [2024-11-03 02:04:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-03 02:04:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2024-11-03 02:04:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:32,378 INFO L225 Difference]: With dead ends: 372 [2024-11-03 02:04:32,378 INFO L226 Difference]: Without dead ends: 336 [2024-11-03 02:04:32,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-03 02:04:32,379 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 60 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:32,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1000 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-03 02:04:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-11-03 02:04:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 222. [2024-11-03 02:04:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 195 states have internal predecessors, (241), 24 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2024-11-03 02:04:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 288 transitions. [2024-11-03 02:04:32,406 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 288 transitions. Word has length 66 [2024-11-03 02:04:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:32,406 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 288 transitions. [2024-11-03 02:04:32,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 02:04:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 288 transitions. [2024-11-03 02:04:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-03 02:04:32,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:32,408 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-03 02:04:32,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-03 02:04:32,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:32,612 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:32,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2024-11-03 02:04:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:32,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028939548] [2024-11-03 02:04:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:32,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:32,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:32,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-03 02:04:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:32,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:04:32,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 02:04:32,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 02:04:33,585 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028939548] [2024-11-03 02:04:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028939548] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:33,585 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:33,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 02:04:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411764307] [2024-11-03 02:04:33,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:33,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:04:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:04:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:04:33,587 INFO L87 Difference]: Start difference. First operand 222 states and 288 transitions. Second operand has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 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) [2024-11-03 02:04:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:34,001 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2024-11-03 02:04:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:04:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 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 68 [2024-11-03 02:04:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:34,002 INFO L225 Difference]: With dead ends: 242 [2024-11-03 02:04:34,002 INFO L226 Difference]: Without dead ends: 216 [2024-11-03 02:04:34,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:04:34,003 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 17 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:34,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 617 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 02:04:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-03 02:04:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 199. [2024-11-03 02:04:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 173 states have internal predecessors, (211), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2024-11-03 02:04:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2024-11-03 02:04:34,025 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 68 [2024-11-03 02:04:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:34,025 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2024-11-03 02:04:34,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 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) [2024-11-03 02:04:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2024-11-03 02:04:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-03 02:04:34,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:34,026 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:34,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-03 02:04:34,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:34,227 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:34,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -197925662, now seen corresponding path program 1 times [2024-11-03 02:04:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332994185] [2024-11-03 02:04:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:34,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:34,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-03 02:04:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:34,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:04:34,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:04:34,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:04:35,272 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332994185] [2024-11-03 02:04:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [332994185] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:35,272 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:35,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 02:04:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577637425] [2024-11-03 02:04:35,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:35,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:04:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:04:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:04:35,273 INFO L87 Difference]: Start difference. First operand 199 states and 254 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:35,514 INFO L93 Difference]: Finished difference Result 225 states and 284 transitions. [2024-11-03 02:04:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:04:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2024-11-03 02:04:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:35,516 INFO L225 Difference]: With dead ends: 225 [2024-11-03 02:04:35,516 INFO L226 Difference]: Without dead ends: 201 [2024-11-03 02:04:35,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:04:35,517 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 23 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:35,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 369 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:04:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-03 02:04:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-11-03 02:04:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 169 states have (on average 1.2071005917159763) internal successors, (204), 173 states have internal predecessors, (204), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2024-11-03 02:04:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 247 transitions. [2024-11-03 02:04:35,553 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 247 transitions. Word has length 67 [2024-11-03 02:04:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:35,554 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 247 transitions. [2024-11-03 02:04:35,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 247 transitions. [2024-11-03 02:04:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-03 02:04:35,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:35,555 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:35,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-03 02:04:35,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:35,755 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:35,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash -474826055, now seen corresponding path program 1 times [2024-11-03 02:04:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432687201] [2024-11-03 02:04:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:35,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:35,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:35,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-03 02:04:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:35,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 02:04:35,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-03 02:04:36,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-03 02:04:36,420 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432687201] [2024-11-03 02:04:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [432687201] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:04:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:04:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-03 02:04:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065795376] [2024-11-03 02:04:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:36,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 02:04:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 02:04:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-03 02:04:36,422 INFO L87 Difference]: Start difference. First operand 199 states and 247 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:36,803 INFO L93 Difference]: Finished difference Result 356 states and 436 transitions. [2024-11-03 02:04:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:04:36,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2024-11-03 02:04:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:36,805 INFO L225 Difference]: With dead ends: 356 [2024-11-03 02:04:36,805 INFO L226 Difference]: Without dead ends: 154 [2024-11-03 02:04:36,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:04:36,807 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:36,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 216 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 02:04:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-03 02:04:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2024-11-03 02:04:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 126 states have internal predecessors, (142), 16 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-03 02:04:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2024-11-03 02:04:36,821 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 68 [2024-11-03 02:04:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:36,822 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2024-11-03 02:04:36,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:04:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2024-11-03 02:04:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-03 02:04:36,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:36,822 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:36,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-03 02:04:37,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:37,024 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:37,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -550644062, now seen corresponding path program 1 times [2024-11-03 02:04:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024844329] [2024-11-03 02:04:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:37,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:37,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:37,027 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:37,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-03 02:04:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:37,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:04:37,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:04:37,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:04:38,198 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024844329] [2024-11-03 02:04:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024844329] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:38,198 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:38,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2024-11-03 02:04:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038550081] [2024-11-03 02:04:38,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:38,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 02:04:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 02:04:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:04:38,199 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:38,410 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2024-11-03 02:04:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 02:04:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2024-11-03 02:04:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:38,411 INFO L225 Difference]: With dead ends: 173 [2024-11-03 02:04:38,411 INFO L226 Difference]: Without dead ends: 127 [2024-11-03 02:04:38,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-03 02:04:38,412 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 26 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:38,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 398 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:04:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-03 02:04:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2024-11-03 02:04:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 107 states have internal predecessors, (119), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-03 02:04:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2024-11-03 02:04:38,425 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 69 [2024-11-03 02:04:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:38,425 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2024-11-03 02:04:38,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2024-11-03 02:04:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-03 02:04:38,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:38,427 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:38,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-03 02:04:38,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:38,627 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:38,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1500339936, now seen corresponding path program 1 times [2024-11-03 02:04:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:38,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084829146] [2024-11-03 02:04:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:38,631 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:38,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-03 02:04:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:38,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:04:38,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-03 02:04:38,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 02:04:39,459 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084829146] [2024-11-03 02:04:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084829146] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:39,459 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-03 02:04:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779328105] [2024-11-03 02:04:39,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:39,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:04:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:04:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:04:39,461 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:04:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:40,055 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2024-11-03 02:04:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:04:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2024-11-03 02:04:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:40,057 INFO L225 Difference]: With dead ends: 171 [2024-11-03 02:04:40,057 INFO L226 Difference]: Without dead ends: 123 [2024-11-03 02:04:40,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:04:40,058 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 39 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:40,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 304 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-03 02:04:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-03 02:04:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-03 02:04:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 107 states have internal predecessors, (118), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-03 02:04:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2024-11-03 02:04:40,070 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 69 [2024-11-03 02:04:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:40,070 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2024-11-03 02:04:40,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:04:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2024-11-03 02:04:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-03 02:04:40,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:40,071 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:40,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2024-11-03 02:04:40,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:40,273 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:40,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2024-11-03 02:04:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:40,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678927049] [2024-11-03 02:04:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:40,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:40,276 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:40,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-03 02:04:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:40,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:04:40,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:04:41,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 02:04:41,638 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678927049] [2024-11-03 02:04:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [678927049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:41,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:41,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-03 02:04:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136858741] [2024-11-03 02:04:41,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:41,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:04:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:04:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:04:41,639 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:42,278 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-11-03 02:04:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:04:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2024-11-03 02:04:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:42,280 INFO L225 Difference]: With dead ends: 135 [2024-11-03 02:04:42,280 INFO L226 Difference]: Without dead ends: 84 [2024-11-03 02:04:42,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:04:42,280 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:42,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 412 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 02:04:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-03 02:04:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-03 02:04:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:04:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2024-11-03 02:04:42,289 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 69 [2024-11-03 02:04:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:42,289 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2024-11-03 02:04:42,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:04:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2024-11-03 02:04:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-03 02:04:42,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:42,290 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-03 02:04:42,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:42,491 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:42,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2024-11-03 02:04:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689896302] [2024-11-03 02:04:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:42,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:42,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:42,493 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:42,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-11-03 02:04:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:42,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-03 02:04:42,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 02:04:44,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 02:04:47,964 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:47,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689896302] [2024-11-03 02:04:47,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [689896302] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:47,965 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:47,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2024-11-03 02:04:47,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307750468] [2024-11-03 02:04:47,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:47,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-03 02:04:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-03 02:04:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-03 02:04:47,967 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-03 02:04:54,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-11-03 02:05:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:05:00,022 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2024-11-03 02:05:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-03 02:05:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 73 [2024-11-03 02:05:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:05:00,024 INFO L225 Difference]: With dead ends: 107 [2024-11-03 02:05:00,024 INFO L226 Difference]: Without dead ends: 68 [2024-11-03 02:05:00,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-03 02:05:00,025 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:05:00,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 455 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2024-11-03 02:05:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-03 02:05:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-03 02:05:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-03 02:05:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2024-11-03 02:05:00,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 73 [2024-11-03 02:05:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:05:00,029 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2024-11-03 02:05:00,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-03 02:05:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2024-11-03 02:05:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 02:05:00,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:05:00,030 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:05:00,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2024-11-03 02:05:00,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:00,231 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:05:00,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:05:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2024-11-03 02:05:00,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:05:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034133315] [2024-11-03 02:05:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:05:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:05:00,232 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:05:00,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-03 02:05:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:05:00,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:05:00,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:05:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 02:05:00,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:05:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 02:05:01,574 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:05:01,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034133315] [2024-11-03 02:05:01,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034133315] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:05:01,574 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:05:01,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2024-11-03 02:05:01,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830985151] [2024-11-03 02:05:01,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:05:01,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:05:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:05:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:05:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:05:01,575 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:05:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:05:02,119 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-11-03 02:05:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:05:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2024-11-03 02:05:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:05:02,121 INFO L225 Difference]: With dead ends: 68 [2024-11-03 02:05:02,121 INFO L226 Difference]: Without dead ends: 0 [2024-11-03 02:05:02,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:05:02,122 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-03 02:05:02,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-03 02:05:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-03 02:05:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-03 02:05:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 02:05:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-03 02:05:02,123 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2024-11-03 02:05:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:05:02,123 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-03 02:05:02,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:05:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-03 02:05:02,123 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-03 02:05:02,126 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-03 02:05:02,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-03 02:05:02,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:02,329 INFO L407 BasicCegarLoop]: Path program histogram: [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] [2024-11-03 02:05:02,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.