/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_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 02:03:40,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 02:03:40,569 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 02:03:40,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 02:03:40,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 02:03:40,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 02:03:40,599 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 02:03:40,599 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 02:03:40,600 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 02:03:40,600 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 02:03:40,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 02:03:40,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 02:03:40,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 02:03:40,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 02:03:40,602 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 02:03:40,602 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 02:03:40,602 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 02:03:40,603 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 02:03:40,605 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 02:03:40,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 02:03:40,607 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 02:03:40,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 02:03:40,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 02:03:40,610 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 02:03:40,610 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 02:03:40,610 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 02:03:40,610 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 02:03:40,610 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 02:03:40,611 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 02:03:40,611 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 02:03:40,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 02:03:40,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 02:03:40,612 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 02:03:40,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 02:03:40,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:40,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 02:03:40,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 02:03:40,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 02:03:40,615 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 02:03:40,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:40,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 02:03:40,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 02:03:40,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 02:03:40,882 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 02:03:40,883 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 02:03:40,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-03 02:03:42,279 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 02:03:42,481 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 02:03:42,481 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-03 02:03:42,491 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cef8ffc54/6857ae0da126409b88fac6ecfc67ccc2/FLAG6d9a0a6a2 [2024-11-03 02:03:42,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cef8ffc54/6857ae0da126409b88fac6ecfc67ccc2 [2024-11-03 02:03:42,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 02:03:42,515 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 02:03:42,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:42,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 02:03:42,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 02:03:42,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aaade1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42, skipping insertion in model container [2024-11-03 02:03:42,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,559 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 02:03:42,733 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_4-2a.c.cil.c[755,768] [2024-11-03 02:03:42,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:42,793 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 02:03:42,808 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_4-2a.c.cil.c[755,768] [2024-11-03 02:03:42,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 02:03:42,853 INFO L204 MainTranslator]: Completed translation [2024-11-03 02:03:42,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42 WrapperNode [2024-11-03 02:03:42,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 02:03:42,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:42,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 02:03:42,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 02:03:42,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,882 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-03 02:03:42,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 02:03:42,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 02:03:42,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 02:03:42,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 02:03:42,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,913 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 02:03:42,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,925 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,926 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 02:03:42,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 02:03:42,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 02:03:42,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 02:03:42,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (1/1) ... [2024-11-03 02:03:42,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 02:03:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 02:03:42,971 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 02:03:42,973 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 02:03:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 02:03:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 02:03:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-03 02:03:43,003 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-03 02:03:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 02:03:43,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 02:03:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-03 02:03:43,003 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-03 02:03:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-03 02:03:43,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-03 02:03:43,110 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 02:03:43,113 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 02:03:43,393 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-03 02:03:43,393 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 02:03:43,407 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 02:03:43,407 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-03 02:03:43,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:43 BoogieIcfgContainer [2024-11-03 02:03:43,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 02:03:43,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 02:03:43,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 02:03:43,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 02:03:43,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:03:42" (1/3) ... [2024-11-03 02:03:43,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ae1943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:43, skipping insertion in model container [2024-11-03 02:03:43,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:03:42" (2/3) ... [2024-11-03 02:03:43,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ae1943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:03:43, skipping insertion in model container [2024-11-03 02:03:43,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:03:43" (3/3) ... [2024-11-03 02:03:43,417 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-03 02:03:43,433 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 02:03:43,433 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 02:03:43,503 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 02:03:43,510 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;@4ac20b50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 02:03:43,511 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 02:03:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 02:03:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-03 02:03:43,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:43,526 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:43,526 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:43,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-11-03 02:03:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:43,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362872651] [2024-11-03 02:03:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:43,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:43,548 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 02:03:43,549 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 02:03:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:43,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:43,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:43,844 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 02:03:43,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:43,918 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 02:03:43,919 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362872651] [2024-11-03 02:03:43,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [362872651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:43,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:43,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-03 02:03:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739981027] [2024-11-03 02:03:43,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:43,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-03 02:03:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-03 02:03:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:43,952 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:44,166 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-11-03 02:03:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-03 02:03:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-03 02:03:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:44,179 INFO L225 Difference]: With dead ends: 128 [2024-11-03 02:03:44,179 INFO L226 Difference]: Without dead ends: 71 [2024-11-03 02:03:44,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-03 02:03:44,185 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:44,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-03 02:03:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-03 02:03:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:03:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-11-03 02:03:44,226 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-11-03 02:03:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:44,227 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-11-03 02:03:44,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 02:03:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-11-03 02:03:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-03 02:03:44,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:44,230 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:44,235 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 02:03:44,433 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 02:03:44,434 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:44,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-11-03 02:03:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:44,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30430268] [2024-11-03 02:03:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:44,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:44,442 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 02:03:44,444 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 02:03:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:44,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:44,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:44,614 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 02:03:44,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:44,669 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 02:03:44,671 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:44,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30430268] [2024-11-03 02:03:44,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [30430268] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:44,671 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:44,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2024-11-03 02:03:44,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861028868] [2024-11-03 02:03:44,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:44,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:03:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:03:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:44,674 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:44,764 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-11-03 02:03:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:03:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-03 02:03:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:44,766 INFO L225 Difference]: With dead ends: 118 [2024-11-03 02:03:44,766 INFO L226 Difference]: Without dead ends: 86 [2024-11-03 02:03:44,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:44,768 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:44,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 419 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-03 02:03:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-11-03 02:03:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-03 02:03:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-11-03 02:03:44,782 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-11-03 02:03:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:44,782 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-11-03 02:03:44,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-11-03 02:03:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-03 02:03:44,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:44,784 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:44,787 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 02:03:44,984 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 02:03:44,985 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:44,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-11-03 02:03:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:44,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281938851] [2024-11-03 02:03:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:44,989 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 02:03:44,990 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 02:03:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:45,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:45,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:45,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 02:03:45,227 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281938851] [2024-11-03 02:03:45,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [281938851] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:45,227 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:45,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-11-03 02:03:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498873499] [2024-11-03 02:03:45,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:45,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-03 02:03:45,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-03 02:03:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:45,231 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:45,366 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-11-03 02:03:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-03 02:03:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-03 02:03:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:45,369 INFO L225 Difference]: With dead ends: 108 [2024-11-03 02:03:45,369 INFO L226 Difference]: Without dead ends: 85 [2024-11-03 02:03:45,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-03 02:03:45,373 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:45,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 501 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-03 02:03:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-11-03 02:03:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-03 02:03:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-11-03 02:03:45,394 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-11-03 02:03:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:45,394 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-11-03 02:03:45,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-03 02:03:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-11-03 02:03:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-03 02:03:45,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:45,397 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:45,401 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 02:03:45,597 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 02:03:45,598 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:45,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-11-03 02:03:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:45,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965149310] [2024-11-03 02:03:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:45,599 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:45,601 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 02:03:45,602 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 02:03:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:45,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:03:45,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:45,823 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 02:03:45,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:45,925 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 02:03:45,925 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:45,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965149310] [2024-11-03 02:03:45,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965149310] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:45,926 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:45,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 02:03:45,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673331858] [2024-11-03 02:03:45,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:45,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 02:03:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 02:03:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 02:03:45,928 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:46,904 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2024-11-03 02:03:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 02:03:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-03 02:03:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:46,906 INFO L225 Difference]: With dead ends: 88 [2024-11-03 02:03:46,906 INFO L226 Difference]: Without dead ends: 86 [2024-11-03 02:03:46,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 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 02:03:46,908 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:46,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 484 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-03 02:03:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-03 02:03:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-11-03 02:03:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-03 02:03:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-11-03 02:03:46,920 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-11-03 02:03:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:46,920 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-11-03 02:03:46,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 02:03:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-11-03 02:03:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 02:03:46,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:46,922 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:46,926 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 02:03:47,123 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 02:03:47,123 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:47,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-11-03 02:03:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:47,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223808428] [2024-11-03 02:03:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:47,127 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 02:03:47,128 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 02:03:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:47,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 02:03:47,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-03 02:03:47,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-03 02:03:47,365 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223808428] [2024-11-03 02:03:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [223808428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:47,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-03 02:03:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373658055] [2024-11-03 02:03:47,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:47,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-03 02:03:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-03 02:03:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:47,370 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:03:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:47,456 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-11-03 02:03:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 02:03:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-03 02:03:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:47,458 INFO L225 Difference]: With dead ends: 117 [2024-11-03 02:03:47,458 INFO L226 Difference]: Without dead ends: 106 [2024-11-03 02:03:47,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:47,461 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:47,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 467 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-03 02:03:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-11-03 02:03:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-03 02:03:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-11-03 02:03:47,479 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-11-03 02:03:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:47,479 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-11-03 02:03:47,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:03:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-11-03 02:03:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 02:03:47,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:47,481 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:47,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:47,683 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 02:03:47,684 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:47,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-11-03 02:03:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:47,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668675035] [2024-11-03 02:03:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:47,687 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 02:03:47,688 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 02:03:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:47,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 02:03:47,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:47,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:48,018 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668675035] [2024-11-03 02:03:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668675035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:48,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:48,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-11-03 02:03:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850138182] [2024-11-03 02:03:48,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:48,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 02:03:48,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 02:03:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:48,022 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:03:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:48,320 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2024-11-03 02:03:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-03 02:03:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-11-03 02:03:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:48,323 INFO L225 Difference]: With dead ends: 135 [2024-11-03 02:03:48,323 INFO L226 Difference]: Without dead ends: 128 [2024-11-03 02:03:48,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-03 02:03:48,325 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:48,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 817 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-03 02:03:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2024-11-03 02:03:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 89 states have internal predecessors, (102), 18 states have call successors, (18), 7 states have call predecessors, (18), 12 states have return successors, (29), 18 states have call predecessors, (29), 17 states have call successors, (29) [2024-11-03 02:03:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2024-11-03 02:03:48,351 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 44 [2024-11-03 02:03:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:48,352 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2024-11-03 02:03:48,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:03:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2024-11-03 02:03:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-03 02:03:48,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:48,355 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:48,360 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 02:03:48,559 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 02:03:48,560 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:48,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-11-03 02:03:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:48,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502192196] [2024-11-03 02:03:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:48,562 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 02:03:48,563 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 02:03:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:48,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 02:03:48,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:48,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:48,947 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:48,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502192196] [2024-11-03 02:03:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502192196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:48,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-03 02:03:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920023784] [2024-11-03 02:03:48,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:48,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-03 02:03:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-03 02:03:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-03 02:03:48,950 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:49,232 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2024-11-03 02:03:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-03 02:03:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-03 02:03:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:49,234 INFO L225 Difference]: With dead ends: 142 [2024-11-03 02:03:49,235 INFO L226 Difference]: Without dead ends: 134 [2024-11-03 02:03:49,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-03 02:03:49,236 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 32 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:49,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 543 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:03:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-03 02:03:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2024-11-03 02:03:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 90 states have (on average 1.211111111111111) internal successors, (109), 93 states have internal predecessors, (109), 19 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (32), 21 states have call predecessors, (32), 18 states have call successors, (32) [2024-11-03 02:03:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2024-11-03 02:03:49,259 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 46 [2024-11-03 02:03:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:49,260 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2024-11-03 02:03:49,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2024-11-03 02:03:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-03 02:03:49,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:49,262 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:49,265 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 02:03:49,462 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 02:03:49,463 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:49,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-11-03 02:03:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:49,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453372472] [2024-11-03 02:03:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:49,464 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:49,466 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 02:03:49,467 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 02:03:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:49,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:03:49,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:49,574 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 02:03:49,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:49,616 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 02:03:49,616 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453372472] [2024-11-03 02:03:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [453372472] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:49,616 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:49,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-03 02:03:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328189822] [2024-11-03 02:03:49,617 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:49,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 02:03:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 02:03:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-03 02:03:49,618 INFO L87 Difference]: Start difference. First operand 122 states and 160 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-03 02:03:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:49,664 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2024-11-03 02:03:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:03:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-03 02:03:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:49,667 INFO L225 Difference]: With dead ends: 130 [2024-11-03 02:03:49,667 INFO L226 Difference]: Without dead ends: 111 [2024-11-03 02:03:49,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-03 02:03:49,668 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:49,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 375 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:03:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-03 02:03:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-03 02:03:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (26), 18 states have call predecessors, (26), 15 states have call successors, (26) [2024-11-03 02:03:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2024-11-03 02:03:49,683 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 46 [2024-11-03 02:03:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:49,684 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2024-11-03 02:03:49,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-03 02:03:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2024-11-03 02:03:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-03 02:03:49,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:49,685 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:49,689 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 02:03:49,885 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 02:03:49,886 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:49,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-11-03 02:03:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459236347] [2024-11-03 02:03:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:49,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:49,888 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 02:03:49,889 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 02:03:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:49,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-03 02:03:49,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:50,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:50,459 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459236347] [2024-11-03 02:03:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [459236347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:50,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-03 02:03:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797140220] [2024-11-03 02:03:50,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:50,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-03 02:03:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-03 02:03:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-03 02:03:50,461 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:51,499 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2024-11-03 02:03:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-03 02:03:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-03 02:03:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:51,502 INFO L225 Difference]: With dead ends: 150 [2024-11-03 02:03:51,502 INFO L226 Difference]: Without dead ends: 137 [2024-11-03 02:03:51,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-03 02:03:51,505 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 68 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:51,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1248 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 02:03:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-03 02:03:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2024-11-03 02:03:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 86 states have internal predecessors, (97), 17 states have call successors, (17), 7 states have call predecessors, (17), 12 states have return successors, (35), 17 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-03 02:03:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2024-11-03 02:03:51,527 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 48 [2024-11-03 02:03:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:51,527 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2024-11-03 02:03:51,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2024-11-03 02:03:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-03 02:03:51,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:51,529 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:51,532 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 02:03:51,731 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 02:03:51,731 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:51,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-11-03 02:03:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:51,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824667160] [2024-11-03 02:03:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:51,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:51,734 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 02:03:51,735 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 02:03:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:51,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-03 02:03:51,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:51,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-03 02:03:52,352 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824667160] [2024-11-03 02:03:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824667160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:52,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-03 02:03:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552760065] [2024-11-03 02:03:52,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:52,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-03 02:03:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-03 02:03:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-03 02:03:52,354 INFO L87 Difference]: Start difference. First operand 111 states and 149 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:53,230 INFO L93 Difference]: Finished difference Result 148 states and 200 transitions. [2024-11-03 02:03:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-03 02:03:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-03 02:03:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:53,233 INFO L225 Difference]: With dead ends: 148 [2024-11-03 02:03:53,233 INFO L226 Difference]: Without dead ends: 121 [2024-11-03 02:03:53,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-03 02:03:53,235 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 86 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:53,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1021 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-03 02:03:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-03 02:03:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2024-11-03 02:03:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 74 states have internal predecessors, (85), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (31), 15 states have call predecessors, (31), 13 states have call successors, (31) [2024-11-03 02:03:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2024-11-03 02:03:53,257 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 48 [2024-11-03 02:03:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:53,257 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2024-11-03 02:03:53,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-03 02:03:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2024-11-03 02:03:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-03 02:03:53,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:53,259 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:53,262 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 02:03:53,460 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 02:03:53,460 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:53,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash -700670325, now seen corresponding path program 1 times [2024-11-03 02:03:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082429594] [2024-11-03 02:03:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:53,462 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 02:03:53,463 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 02:03:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:53,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 02:03:53,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-03 02:03:53,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 02:03:53,799 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:53,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082429594] [2024-11-03 02:03:53,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082429594] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 02:03:53,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 02:03:53,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-03 02:03:53,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103303213] [2024-11-03 02:03:53,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:53,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 02:03:53,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 02:03:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-03 02:03:53,801 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:03:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:53,943 INFO L93 Difference]: Finished difference Result 182 states and 249 transitions. [2024-11-03 02:03:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:53,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2024-11-03 02:03:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:53,946 INFO L225 Difference]: With dead ends: 182 [2024-11-03 02:03:53,946 INFO L226 Difference]: Without dead ends: 146 [2024-11-03 02:03:53,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:53,947 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 43 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:53,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 310 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-03 02:03:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2024-11-03 02:03:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 105 states have internal predecessors, (118), 21 states have call successors, (21), 6 states have call predecessors, (21), 15 states have return successors, (45), 21 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-03 02:03:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 184 transitions. [2024-11-03 02:03:53,962 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 184 transitions. Word has length 53 [2024-11-03 02:03:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:53,962 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 184 transitions. [2024-11-03 02:03:53,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 02:03:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 184 transitions. [2024-11-03 02:03:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 02:03:53,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:53,963 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:53,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:54,165 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 02:03:54,165 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:54,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-11-03 02:03:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258231496] [2024-11-03 02:03:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:54,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:54,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:54,167 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 02:03:54,168 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 02:03:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:54,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:54,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:54,426 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 02:03:54,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:54,643 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 02:03:54,643 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258231496] [2024-11-03 02:03:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [258231496] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:03:54,643 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:03:54,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-11-03 02:03:54,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58373073] [2024-11-03 02:03:54,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:03:54,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 02:03:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 02:03:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:54,645 INFO L87 Difference]: Start difference. First operand 133 states and 184 transitions. Second operand has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:54,732 INFO L93 Difference]: Finished difference Result 154 states and 212 transitions. [2024-11-03 02:03:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2024-11-03 02:03:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:54,734 INFO L225 Difference]: With dead ends: 154 [2024-11-03 02:03:54,734 INFO L226 Difference]: Without dead ends: 132 [2024-11-03 02:03:54,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 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 02:03:54,736 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 19 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:54,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 400 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-03 02:03:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2024-11-03 02:03:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 93 states have internal predecessors, (106), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (41), 17 states have call predecessors, (41), 16 states have call successors, (41) [2024-11-03 02:03:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2024-11-03 02:03:54,752 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 49 [2024-11-03 02:03:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:54,753 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2024-11-03 02:03:54,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 02:03:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2024-11-03 02:03:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-03 02:03:54,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:54,754 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:54,759 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 02:03:54,956 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 02:03:54,956 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:54,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-11-03 02:03:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:54,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413653491] [2024-11-03 02:03:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:54,957 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:54,958 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 02:03:54,959 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 02:03:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:55,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:55,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:55,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:55,206 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413653491] [2024-11-03 02:03:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413653491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:55,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:55,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-03 02:03:55,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583228960] [2024-11-03 02:03:55,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:55,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-03 02:03:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-03 02:03:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:55,208 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:55,346 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2024-11-03 02:03:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-03 02:03:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:55,348 INFO L225 Difference]: With dead ends: 136 [2024-11-03 02:03:55,348 INFO L226 Difference]: Without dead ends: 123 [2024-11-03 02:03:55,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:55,349 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 19 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:55,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 470 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-03 02:03:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-03 02:03:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 93 states have internal predecessors, (106), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-03 02:03:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2024-11-03 02:03:55,359 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 63 [2024-11-03 02:03:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:55,360 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2024-11-03 02:03:55,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2024-11-03 02:03:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-03 02:03:55,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:55,361 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:55,364 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 02:03:55,561 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 02:03:55,562 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:55,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash 18588658, now seen corresponding path program 2 times [2024-11-03 02:03:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120410791] [2024-11-03 02:03:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:55,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:55,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:55,563 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 02:03:55,565 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 02:03:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:55,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:55,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:55,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:55,778 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120410791] [2024-11-03 02:03:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [120410791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:55,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:55,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-03 02:03:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478694036] [2024-11-03 02:03:55,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:55,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-03 02:03:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-03 02:03:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:55,780 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:55,922 INFO L93 Difference]: Finished difference Result 134 states and 184 transitions. [2024-11-03 02:03:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-03 02:03:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:55,924 INFO L225 Difference]: With dead ends: 134 [2024-11-03 02:03:55,924 INFO L226 Difference]: Without dead ends: 123 [2024-11-03 02:03:55,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-03 02:03:55,925 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:55,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 479 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-03 02:03:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-03 02:03:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 93 states have internal predecessors, (106), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-03 02:03:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2024-11-03 02:03:55,952 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 63 [2024-11-03 02:03:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:55,953 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2024-11-03 02:03:55,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2024-11-03 02:03:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-03 02:03:55,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:55,954 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:55,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-03 02:03:56,154 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 02:03:56,155 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:56,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-11-03 02:03:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736776965] [2024-11-03 02:03:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:56,157 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 02:03:56,158 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 02:03:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:56,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:56,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:56,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:56,413 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736776965] [2024-11-03 02:03:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736776965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:56,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:56,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-03 02:03:56,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448759744] [2024-11-03 02:03:56,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:56,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-03 02:03:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-03 02:03:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:56,414 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:56,539 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2024-11-03 02:03:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-03 02:03:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:56,541 INFO L225 Difference]: With dead ends: 134 [2024-11-03 02:03:56,541 INFO L226 Difference]: Without dead ends: 117 [2024-11-03 02:03:56,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-03 02:03:56,542 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 34 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:56,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 495 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-03 02:03:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-03 02:03:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 93 states have internal predecessors, (104), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-03 02:03:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2024-11-03 02:03:56,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 65 [2024-11-03 02:03:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:56,553 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2024-11-03 02:03:56,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2024-11-03 02:03:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-03 02:03:56,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:56,555 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:56,557 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 02:03:56,755 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 02:03:56,756 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:56,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1269391674, now seen corresponding path program 2 times [2024-11-03 02:03:56,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:56,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932261172] [2024-11-03 02:03:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:56,757 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 02:03:56,758 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 02:03:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:56,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-03 02:03:56,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:56,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-03 02:03:56,980 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:56,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932261172] [2024-11-03 02:03:56,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932261172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:56,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:56,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-03 02:03:56,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588965097] [2024-11-03 02:03:56,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:56,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-03 02:03:56,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-03 02:03:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-03 02:03:56,981 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:03:57,135 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2024-11-03 02:03:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 02:03:57,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-03 02:03:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:03:57,137 INFO L225 Difference]: With dead ends: 128 [2024-11-03 02:03:57,137 INFO L226 Difference]: Without dead ends: 114 [2024-11-03 02:03:57,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-03 02:03:57,138 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 45 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:03:57,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 407 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 02:03:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-03 02:03:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-03 02:03:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 90 states have internal predecessors, (101), 17 states have call successors, (17), 6 states have call predecessors, (17), 12 states have return successors, (38), 17 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-03 02:03:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2024-11-03 02:03:57,152 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 156 transitions. Word has length 65 [2024-11-03 02:03:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:03:57,153 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 156 transitions. [2024-11-03 02:03:57,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-03 02:03:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 156 transitions. [2024-11-03 02:03:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-03 02:03:57,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:03:57,155 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:03:57,158 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 02:03:57,355 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 02:03:57,355 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:03:57,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:03:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 1 times [2024-11-03 02:03:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:03:57,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820795156] [2024-11-03 02:03:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:03:57,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:03:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:03:57,359 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 02:03:57,361 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 02:03:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:03:57,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-03 02:03:57,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:03:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-03 02:03:58,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:03:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 02:03:59,647 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:03:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820795156] [2024-11-03 02:03:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820795156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:03:59,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:03:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-03 02:03:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760124385] [2024-11-03 02:03:59,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:03:59,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-03 02:03:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:03:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-03 02:03:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-11-03 02:03:59,649 INFO L87 Difference]: Start difference. First operand 114 states and 156 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:01,549 INFO L93 Difference]: Finished difference Result 177 states and 235 transitions. [2024-11-03 02:04:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-03 02:04:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-03 02:04:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:01,551 INFO L225 Difference]: With dead ends: 177 [2024-11-03 02:04:01,551 INFO L226 Difference]: Without dead ends: 160 [2024-11-03 02:04:01,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2024-11-03 02:04:01,553 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 53 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:01,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1109 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-03 02:04:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-03 02:04:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2024-11-03 02:04:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 113 states have internal predecessors, (128), 21 states have call successors, (21), 7 states have call predecessors, (21), 14 states have return successors, (42), 21 states have call predecessors, (42), 20 states have call successors, (42) [2024-11-03 02:04:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2024-11-03 02:04:01,568 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 72 [2024-11-03 02:04:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:01,568 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2024-11-03 02:04:01,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2024-11-03 02:04:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 02:04:01,570 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:01,570 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:01,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-03 02:04:01,770 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 02:04:01,771 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:01,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 1 times [2024-11-03 02:04:01,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:01,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080127394] [2024-11-03 02:04:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:01,774 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 02:04:01,774 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 02:04:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:01,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-03 02:04:01,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-03 02:04:02,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 02:04:03,722 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:03,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080127394] [2024-11-03 02:04:03,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080127394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:03,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:03,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-03 02:04:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998243643] [2024-11-03 02:04:03,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:03,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-03 02:04:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-03 02:04:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-03 02:04:03,724 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:05,090 INFO L93 Difference]: Finished difference Result 183 states and 241 transitions. [2024-11-03 02:04:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-03 02:04:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-03 02:04:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:05,092 INFO L225 Difference]: With dead ends: 183 [2024-11-03 02:04:05,092 INFO L226 Difference]: Without dead ends: 169 [2024-11-03 02:04:05,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-03 02:04:05,093 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 35 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:05,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1003 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-03 02:04:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-03 02:04:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 150. [2024-11-03 02:04:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 119 states have internal predecessors, (136), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (40), 22 states have call predecessors, (40), 21 states have call successors, (40) [2024-11-03 02:04:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2024-11-03 02:04:05,110 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 74 [2024-11-03 02:04:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:05,110 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2024-11-03 02:04:05,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2024-11-03 02:04:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 02:04:05,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:05,111 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:05,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-03 02:04:05,312 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 02:04:05,312 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:05,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 564181814, now seen corresponding path program 1 times [2024-11-03 02:04:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490922952] [2024-11-03 02:04:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:05,314 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 02:04:05,315 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 02:04:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:05,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:04:05,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:05,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:05,440 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490922952] [2024-11-03 02:04:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490922952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:05,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:05,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-03 02:04:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925707590] [2024-11-03 02:04:05,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:05,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:04:05,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:04:05,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:04:05,442 INFO L87 Difference]: Start difference. First operand 150 states and 198 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:04:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:05,481 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2024-11-03 02:04:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:04:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2024-11-03 02:04:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:05,483 INFO L225 Difference]: With dead ends: 161 [2024-11-03 02:04:05,483 INFO L226 Difference]: Without dead ends: 156 [2024-11-03 02:04:05,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 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 02:04:05,484 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:05,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 326 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:04:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-03 02:04:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2024-11-03 02:04:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 119 states have internal predecessors, (136), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (40), 22 states have call predecessors, (40), 21 states have call successors, (40) [2024-11-03 02:04:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2024-11-03 02:04:05,503 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 74 [2024-11-03 02:04:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:05,503 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2024-11-03 02:04:05,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-03 02:04:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2024-11-03 02:04:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-03 02:04:05,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:05,504 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:05,507 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 02:04:05,705 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 02:04:05,705 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:05,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 2 times [2024-11-03 02:04:05,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674930672] [2024-11-03 02:04:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:05,709 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 02:04:05,709 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 02:04:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:05,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-03 02:04:05,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-03 02:04:06,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 02:04:07,622 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674930672] [2024-11-03 02:04:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [674930672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:07,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:07,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-03 02:04:07,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199712699] [2024-11-03 02:04:07,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:07,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-03 02:04:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-03 02:04:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-11-03 02:04:07,624 INFO L87 Difference]: Start difference. First operand 150 states and 198 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:09,644 INFO L93 Difference]: Finished difference Result 204 states and 273 transitions. [2024-11-03 02:04:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-03 02:04:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-03 02:04:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:09,646 INFO L225 Difference]: With dead ends: 204 [2024-11-03 02:04:09,646 INFO L226 Difference]: Without dead ends: 192 [2024-11-03 02:04:09,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2024-11-03 02:04:09,647 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 70 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:09,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1046 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-03 02:04:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-03 02:04:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2024-11-03 02:04:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 133 states have internal predecessors, (152), 26 states have call successors, (26), 9 states have call predecessors, (26), 15 states have return successors, (52), 26 states have call predecessors, (52), 25 states have call successors, (52) [2024-11-03 02:04:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2024-11-03 02:04:09,671 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 72 [2024-11-03 02:04:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:09,671 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2024-11-03 02:04:09,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-03 02:04:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2024-11-03 02:04:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-03 02:04:09,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:09,672 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:09,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-11-03 02:04:09,872 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 02:04:09,873 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:09,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1619502586, now seen corresponding path program 1 times [2024-11-03 02:04:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726500797] [2024-11-03 02:04:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:09,874 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 02:04:09,875 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 02:04:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:09,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-03 02:04:09,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:10,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:11,915 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726500797] [2024-11-03 02:04:11,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [726500797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:11,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:11,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-03 02:04:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670131632] [2024-11-03 02:04:11,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:11,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-03 02:04:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-03 02:04:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-03 02:04:11,918 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:12,892 INFO L93 Difference]: Finished difference Result 202 states and 270 transitions. [2024-11-03 02:04:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-03 02:04:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 77 [2024-11-03 02:04:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:12,895 INFO L225 Difference]: With dead ends: 202 [2024-11-03 02:04:12,895 INFO L226 Difference]: Without dead ends: 188 [2024-11-03 02:04:12,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2024-11-03 02:04:12,896 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:12,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 853 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-03 02:04:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-03 02:04:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 169. [2024-11-03 02:04:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 133 states have internal predecessors, (150), 26 states have call successors, (26), 9 states have call predecessors, (26), 15 states have return successors, (50), 26 states have call predecessors, (50), 25 states have call successors, (50) [2024-11-03 02:04:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 226 transitions. [2024-11-03 02:04:12,920 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 226 transitions. Word has length 77 [2024-11-03 02:04:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:12,920 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 226 transitions. [2024-11-03 02:04:12,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 226 transitions. [2024-11-03 02:04:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-03 02:04:12,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:12,922 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:04:12,931 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 02:04:13,122 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 02:04:13,123 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:13,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash 624577500, now seen corresponding path program 1 times [2024-11-03 02:04:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:13,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872327253] [2024-11-03 02:04:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:13,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:13,126 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 02:04:13,127 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 02:04:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:13,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 02:04:13,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:13,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:13,253 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:13,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872327253] [2024-11-03 02:04:13,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [872327253] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 02:04:13,253 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 02:04:13,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-11-03 02:04:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643486006] [2024-11-03 02:04:13,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 02:04:13,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 02:04:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 02:04:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-03 02:04:13,254 INFO L87 Difference]: Start difference. First operand 169 states and 226 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-03 02:04:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:13,310 INFO L93 Difference]: Finished difference Result 183 states and 241 transitions. [2024-11-03 02:04:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 02:04:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2024-11-03 02:04:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:13,314 INFO L225 Difference]: With dead ends: 183 [2024-11-03 02:04:13,314 INFO L226 Difference]: Without dead ends: 174 [2024-11-03 02:04:13,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 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 02:04:13,315 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:13,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 310 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 02:04:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-03 02:04:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-03 02:04:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 137 states have internal predecessors, (154), 26 states have call successors, (26), 9 states have call predecessors, (26), 16 states have return successors, (49), 27 states have call predecessors, (49), 25 states have call successors, (49) [2024-11-03 02:04:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2024-11-03 02:04:13,346 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 76 [2024-11-03 02:04:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:13,346 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2024-11-03 02:04:13,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-03 02:04:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2024-11-03 02:04:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-03 02:04:13,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:13,348 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:13,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-03 02:04:13,548 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 02:04:13,548 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:13,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2024-11-03 02:04:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470671007] [2024-11-03 02:04:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:13,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:13,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:13,553 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 02:04:13,554 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 02:04:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:13,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-03 02:04:13,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:14,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:18,394 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:18,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470671007] [2024-11-03 02:04:18,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [470671007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:18,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:18,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-11-03 02:04:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320712483] [2024-11-03 02:04:18,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:18,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-03 02:04:18,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-03 02:04:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2024-11-03 02:04:18,396 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:27,973 INFO L93 Difference]: Finished difference Result 217 states and 282 transitions. [2024-11-03 02:04:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-03 02:04:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-03 02:04:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:27,975 INFO L225 Difference]: With dead ends: 217 [2024-11-03 02:04:27,975 INFO L226 Difference]: Without dead ends: 204 [2024-11-03 02:04:27,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=468, Invalid=4644, Unknown=0, NotChecked=0, Total=5112 [2024-11-03 02:04:27,977 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:27,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1436 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-03 02:04:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-03 02:04:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 147. [2024-11-03 02:04:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 112 states have (on average 1.1875) internal successors, (133), 116 states have internal predecessors, (133), 21 states have call successors, (21), 8 states have call predecessors, (21), 13 states have return successors, (33), 22 states have call predecessors, (33), 20 states have call successors, (33) [2024-11-03 02:04:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2024-11-03 02:04:28,008 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 79 [2024-11-03 02:04:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:28,008 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2024-11-03 02:04:28,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2024-11-03 02:04:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-03 02:04:28,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:28,010 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:28,013 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 02:04:28,210 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 02:04:28,211 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:28,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash -823382364, now seen corresponding path program 1 times [2024-11-03 02:04:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105696031] [2024-11-03 02:04:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:28,211 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:28,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:28,213 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 02:04:28,213 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 02:04:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:28,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-03 02:04:28,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:28,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:29,671 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105696031] [2024-11-03 02:04:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [105696031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:29,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-03 02:04:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106376514] [2024-11-03 02:04:29,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:29,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-03 02:04:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-03 02:04:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-03 02:04:29,673 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:31,024 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2024-11-03 02:04:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-03 02:04:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 78 [2024-11-03 02:04:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:31,026 INFO L225 Difference]: With dead ends: 177 [2024-11-03 02:04:31,026 INFO L226 Difference]: Without dead ends: 126 [2024-11-03 02:04:31,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-03 02:04:31,027 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 51 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:31,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1109 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-03 02:04:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-03 02:04:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2024-11-03 02:04:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 15 states have call successors, (15), 6 states have call predecessors, (15), 10 states have return successors, (22), 16 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-03 02:04:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2024-11-03 02:04:31,048 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 78 [2024-11-03 02:04:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:31,049 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2024-11-03 02:04:31,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2024-11-03 02:04:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-03 02:04:31,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:31,050 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:31,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2024-11-03 02:04:31,250 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 02:04:31,251 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:31,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 1 times [2024-11-03 02:04:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302442718] [2024-11-03 02:04:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:31,253 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 02:04:31,254 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 02:04:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:31,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-03 02:04:31,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:32,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:34,486 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302442718] [2024-11-03 02:04:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302442718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:34,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:34,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2024-11-03 02:04:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089322685] [2024-11-03 02:04:34,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:34,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-03 02:04:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-03 02:04:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-03 02:04:34,488 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:37,255 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2024-11-03 02:04:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-03 02:04:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 81 [2024-11-03 02:04:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:37,258 INFO L225 Difference]: With dead ends: 164 [2024-11-03 02:04:37,258 INFO L226 Difference]: Without dead ends: 144 [2024-11-03 02:04:37,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2024-11-03 02:04:37,259 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 63 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:37,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1053 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-03 02:04:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-03 02:04:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2024-11-03 02:04:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 99 states have internal predecessors, (110), 19 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (33), 20 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-03 02:04:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2024-11-03 02:04:37,292 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 81 [2024-11-03 02:04:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:37,293 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2024-11-03 02:04:37,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2024-11-03 02:04:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-03 02:04:37,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:37,294 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2024-11-03 02:04:37,494 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 02:04:37,495 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:37,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2024-11-03 02:04:37,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:37,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270121932] [2024-11-03 02:04:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:37,498 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 02:04:37,499 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 02:04:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:37,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-03 02:04:37,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:38,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:40,465 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270121932] [2024-11-03 02:04:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [270121932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:40,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:40,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2024-11-03 02:04:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194398499] [2024-11-03 02:04:40,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:40,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-03 02:04:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-03 02:04:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-11-03 02:04:40,467 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:44,021 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2024-11-03 02:04:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-03 02:04:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-03 02:04:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:44,023 INFO L225 Difference]: With dead ends: 184 [2024-11-03 02:04:44,023 INFO L226 Difference]: Without dead ends: 167 [2024-11-03 02:04:44,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2024-11-03 02:04:44,024 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 86 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:44,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1070 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-03 02:04:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-03 02:04:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2024-11-03 02:04:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 118 states have internal predecessors, (133), 22 states have call successors, (22), 8 states have call predecessors, (22), 13 states have return successors, (34), 23 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-03 02:04:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2024-11-03 02:04:44,060 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 79 [2024-11-03 02:04:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:44,060 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2024-11-03 02:04:44,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-03 02:04:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2024-11-03 02:04:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-03 02:04:44,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:44,062 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:44,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-11-03 02:04:44,262 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 02:04:44,262 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:44,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 1 times [2024-11-03 02:04:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532357691] [2024-11-03 02:04:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:44,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:44,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:44,264 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 02:04:44,265 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 02:04:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:44,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:04:44,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:44,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:44,639 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:44,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532357691] [2024-11-03 02:04:44,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532357691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:44,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-03 02:04:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040395866] [2024-11-03 02:04:44,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:44,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-03 02:04:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-03 02:04:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-03 02:04:44,641 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-03 02:04:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:44,926 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2024-11-03 02:04:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 02:04:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2024-11-03 02:04:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:44,927 INFO L225 Difference]: With dead ends: 164 [2024-11-03 02:04:44,927 INFO L226 Difference]: Without dead ends: 141 [2024-11-03 02:04:44,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-03 02:04:44,928 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 56 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:44,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 716 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:04:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-03 02:04:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2024-11-03 02:04:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 107 states have internal predecessors, (120), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2024-11-03 02:04:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2024-11-03 02:04:44,959 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 82 [2024-11-03 02:04:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:44,959 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2024-11-03 02:04:44,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-03 02:04:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2024-11-03 02:04:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-03 02:04:44,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:44,961 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:44,964 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 02:04:45,161 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 02:04:45,161 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:45,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1126803066, now seen corresponding path program 2 times [2024-11-03 02:04:45,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:45,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566768538] [2024-11-03 02:04:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:45,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:45,165 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 02:04:45,166 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 02:04:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:45,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-03 02:04:45,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:04:45,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:04:47,405 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:47,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566768538] [2024-11-03 02:04:47,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [566768538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:47,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:47,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-03 02:04:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438545300] [2024-11-03 02:04:47,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:47,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-03 02:04:47,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-03 02:04:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-11-03 02:04:47,406 INFO L87 Difference]: Start difference. First operand 136 states and 170 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:04:48,893 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2024-11-03 02:04:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-03 02:04:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-11-03 02:04:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:04:48,895 INFO L225 Difference]: With dead ends: 164 [2024-11-03 02:04:48,895 INFO L226 Difference]: Without dead ends: 155 [2024-11-03 02:04:48,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2024-11-03 02:04:48,896 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 31 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-03 02:04:48,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 977 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-03 02:04:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-03 02:04:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2024-11-03 02:04:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 107 states have (on average 1.158878504672897) internal successors, (124), 112 states have internal predecessors, (124), 22 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (33), 23 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-03 02:04:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2024-11-03 02:04:48,928 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 77 [2024-11-03 02:04:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:04:48,928 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2024-11-03 02:04:48,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:04:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2024-11-03 02:04:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-03 02:04:48,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:04:48,929 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:04:48,933 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 02:04:49,130 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 02:04:49,130 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:04:49,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:04:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2024-11-03 02:04:49,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:04:49,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908497144] [2024-11-03 02:04:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:04:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:04:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:04:49,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:04:49,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-03 02:04:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:04:49,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-03 02:04:49,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:04:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-03 02:04:50,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:04:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-03 02:04:56,133 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:04:56,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908497144] [2024-11-03 02:04:56,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [908497144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:04:56,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:04:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2024-11-03 02:04:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65445251] [2024-11-03 02:04:56,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:04:56,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-03 02:04:56,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:04:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-03 02:04:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2024-11-03 02:04:56,135 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-03 02:05:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:05:10,396 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2024-11-03 02:05:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-03 02:05:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-03 02:05:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:05:10,399 INFO L225 Difference]: With dead ends: 168 [2024-11-03 02:05:10,399 INFO L226 Difference]: Without dead ends: 159 [2024-11-03 02:05:10,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=441, Invalid=4529, Unknown=0, NotChecked=0, Total=4970 [2024-11-03 02:05:10,400 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-03 02:05:10,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1446 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-03 02:05:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-03 02:05:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2024-11-03 02:05:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 107 states have (on average 1.158878504672897) internal successors, (124), 112 states have internal predecessors, (124), 22 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (33), 23 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-03 02:05:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2024-11-03 02:05:10,433 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 84 [2024-11-03 02:05:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:05:10,433 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2024-11-03 02:05:10,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-03 02:05:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2024-11-03 02:05:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-03 02:05:10,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:05:10,434 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:05:10,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-03 02:05:10,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:10,635 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:05:10,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:05:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -411611933, now seen corresponding path program 1 times [2024-11-03 02:05:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:05:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861034453] [2024-11-03 02:05:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:05:10,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:05:10,637 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:05:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-03 02:05:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:05:10,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 02:05:10,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:05:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:05:10,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:05:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:05:11,010 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:05:11,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861034453] [2024-11-03 02:05:11,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861034453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:05:11,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:05:11,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-03 02:05:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12253223] [2024-11-03 02:05:11,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:05:11,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-03 02:05:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:05:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-03 02:05:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-03 02:05:11,011 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-03 02:05:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:05:11,367 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2024-11-03 02:05:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 02:05:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2024-11-03 02:05:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:05:11,369 INFO L225 Difference]: With dead ends: 155 [2024-11-03 02:05:11,369 INFO L226 Difference]: Without dead ends: 148 [2024-11-03 02:05:11,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-11-03 02:05:11,370 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 69 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 02:05:11,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 773 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 02:05:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-03 02:05:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2024-11-03 02:05:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.161904761904762) internal successors, (122), 111 states have internal predecessors, (122), 22 states have call successors, (22), 7 states have call predecessors, (22), 13 states have return successors, (32), 22 states have call predecessors, (32), 21 states have call successors, (32) [2024-11-03 02:05:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2024-11-03 02:05:11,414 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 80 [2024-11-03 02:05:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:05:11,415 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2024-11-03 02:05:11,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-03 02:05:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2024-11-03 02:05:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-03 02:05:11,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:05:11,416 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:05:11,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2024-11-03 02:05:11,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:11,617 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:05:11,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:05:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625504, now seen corresponding path program 2 times [2024-11-03 02:05:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:05:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770377328] [2024-11-03 02:05:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:05:11,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:05:11,621 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:05:11,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-03 02:05:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:05:11,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-03 02:05:11,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:05:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 02:05:12,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 02:05:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-03 02:05:13,135 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 02:05:13,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770377328] [2024-11-03 02:05:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770377328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 02:05:13,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 02:05:13,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-03 02:05:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437440878] [2024-11-03 02:05:13,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 02:05:13,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-03 02:05:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 02:05:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-03 02:05:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-03 02:05:13,137 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:05:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 02:05:14,081 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2024-11-03 02:05:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-03 02:05:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 78 [2024-11-03 02:05:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 02:05:14,083 INFO L225 Difference]: With dead ends: 172 [2024-11-03 02:05:14,083 INFO L226 Difference]: Without dead ends: 138 [2024-11-03 02:05:14,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-03 02:05:14,084 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 12 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 02:05:14,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 978 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 02:05:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-03 02:05:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-03 02:05:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.145631067961165) internal successors, (118), 108 states have internal predecessors, (118), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (31), 22 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-03 02:05:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2024-11-03 02:05:14,116 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 78 [2024-11-03 02:05:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 02:05:14,116 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2024-11-03 02:05:14,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-03 02:05:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2024-11-03 02:05:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-03 02:05:14,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 02:05:14,117 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 02:05:14,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-11-03 02:05:14,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:14,320 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 02:05:14,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 02:05:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 1 times [2024-11-03 02:05:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 02:05:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930258351] [2024-11-03 02:05:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 02:05:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 02:05:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 02:05:14,322 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 02:05:14,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-03 02:05:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 02:05:14,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-03 02:05:14,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 02:05:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-03 02:05:16,360 INFO L311 TraceCheckSpWp]: Computing backward predicates...