/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-356b6ba-m [2024-10-31 19:33:07,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:33:07,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 19:33:07,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:33:07,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:33:07,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:33:07,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:33:07,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:33:07,293 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:33:07,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:33:07,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:33:07,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:33:07,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:33:07,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:33:07,295 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:33:07,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:33:07,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:33:07,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:33:07,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:33:07,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:33:07,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:33:07,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:33:07,300 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:33:07,300 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:33:07,301 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:33:07,301 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:33:07,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:33:07,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:33:07,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:33:07,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:07,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:33:07,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:33:07,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:33:07,303 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:33:07,303 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:07,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:33:07,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:33:07,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:33:07,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:33:07,304 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:33:07,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:07,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:33:07,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:33:07,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:33:07,557 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:33:07,558 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:33:07,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 19:33:08,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:33:08,913 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:33:08,913 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 19:33:08,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb29b1e3/9f34d8bf1da1418b99e2b647e595eb01/FLAG5ee06e4a7 [2024-10-31 19:33:08,931 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb29b1e3/9f34d8bf1da1418b99e2b647e595eb01 [2024-10-31 19:33:08,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:33:08,934 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:33:08,935 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:08,935 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:33:08,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:33:08,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:08" (1/1) ... [2024-10-31 19:33:08,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e903e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:08, skipping insertion in model container [2024-10-31 19:33:08,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:08" (1/1) ... [2024-10-31 19:33:08,960 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:33:09,084 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-10-31 19:33:09,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:09,142 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:33:09,166 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-10-31 19:33:09,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:09,200 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:33:09,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09 WrapperNode [2024-10-31 19:33:09,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:09,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:09,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:33:09,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:33:09,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,234 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-10-31 19:33:09,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:09,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:33:09,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:33:09,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:33:09,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,260 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 19:33:09,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:33:09,279 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:33:09,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:33:09,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:33:09,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (1/1) ... [2024-10-31 19:33:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:33:09,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 19:33:09,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 19:33:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:33:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:33:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 19:33:09,340 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 19:33:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:33:09,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:33:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-10-31 19:33:09,342 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-10-31 19:33:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 19:33:09,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 19:33:09,407 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:33:09,408 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:33:09,581 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-10-31 19:33:09,581 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:33:09,591 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:33:09,591 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 19:33:09,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:09 BoogieIcfgContainer [2024-10-31 19:33:09,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:33:09,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:33:09,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:33:09,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:33:09,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:33:08" (1/3) ... [2024-10-31 19:33:09,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e896605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:09, skipping insertion in model container [2024-10-31 19:33:09,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:09" (2/3) ... [2024-10-31 19:33:09,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e896605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:09, skipping insertion in model container [2024-10-31 19:33:09,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:09" (3/3) ... [2024-10-31 19:33:09,597 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-10-31 19:33:09,609 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:33:09,609 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:33:09,643 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:33:09,648 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;@d90d301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:33:09,648 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:33:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 19:33:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 19:33:09,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:09,657 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:09,658 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:09,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-10-31 19:33:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:09,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952497183] [2024-10-31 19:33:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:09,673 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:09,675 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) [2024-10-31 19:33:09,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-10-31 19:33:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:09,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:33:09,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:09,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:09,952 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952497183] [2024-10-31 19:33:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [952497183] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:09,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-10-31 19:33:09,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250035039] [2024-10-31 19:33:09,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:09,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 19:33:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 19:33:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:09,979 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 19:33:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:10,122 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-10-31 19:33:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 19:33:10,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-31 19:33:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:10,130 INFO L225 Difference]: With dead ends: 128 [2024-10-31 19:33:10,130 INFO L226 Difference]: Without dead ends: 71 [2024-10-31 19:33:10,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 19:33:10,135 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:10,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-31 19:33:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-10-31 19:33:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-31 19:33:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-10-31 19:33:10,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-10-31 19:33:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:10,170 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-10-31 19:33:10,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 19:33:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-10-31 19:33:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 19:33:10,174 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:10,175 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:10,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:10,375 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 [2024-10-31 19:33:10,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:10,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-10-31 19:33:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:10,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912334394] [2024-10-31 19:33:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:10,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:10,381 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) [2024-10-31 19:33:10,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-10-31 19:33:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:10,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 19:33:10,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:10,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:10,558 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:10,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912334394] [2024-10-31 19:33:10,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1912334394] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:10,558 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:10,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2024-10-31 19:33:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806684355] [2024-10-31 19:33:10,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:10,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 19:33:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 19:33:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:33:10,562 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) [2024-10-31 19:33:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:10,626 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-10-31 19:33:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:33:10,627 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 [2024-10-31 19:33:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:10,628 INFO L225 Difference]: With dead ends: 118 [2024-10-31 19:33:10,628 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 19:33:10,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:10,629 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:10,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 419 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 19:33:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-10-31 19:33:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-10-31 19:33:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-10-31 19:33:10,645 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-10-31 19:33:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:10,646 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-10-31 19:33:10,646 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) [2024-10-31 19:33:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-10-31 19:33:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 19:33:10,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:10,648 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:10,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:10,849 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 [2024-10-31 19:33:10,849 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:10,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-10-31 19:33:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953011760] [2024-10-31 19:33:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:10,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:10,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:10,852 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) [2024-10-31 19:33:10,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-10-31 19:33:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:10,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:33:10,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:10,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 19:33:11,024 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953011760] [2024-10-31 19:33:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [953011760] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:11,024 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:11,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-10-31 19:33:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53558663] [2024-10-31 19:33:11,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:11,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 19:33:11,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 19:33:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:11,026 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 19:33:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:11,113 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-10-31 19:33:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 19:33:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-10-31 19:33:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:11,115 INFO L225 Difference]: With dead ends: 108 [2024-10-31 19:33:11,115 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 19:33:11,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 19:33:11,117 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:11,117 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] [2024-10-31 19:33:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 19:33:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-10-31 19:33:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 19:33:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-10-31 19:33:11,128 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-10-31 19:33:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:11,128 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-10-31 19:33:11,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 19:33:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-10-31 19:33:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 19:33:11,132 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:11,132 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:11,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:33:11,332 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 [2024-10-31 19:33:11,333 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:11,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:11,334 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-10-31 19:33:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554968436] [2024-10-31 19:33:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:11,334 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:11,337 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) [2024-10-31 19:33:11,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:33:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:11,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:33:11,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 19:33:11,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 19:33:11,598 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:11,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554968436] [2024-10-31 19:33:11,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554968436] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:11,600 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:11,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 19:33:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399214799] [2024-10-31 19:33:11,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:11,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 19:33:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 19:33:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:33:11,602 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 19:33:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:12,425 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2024-10-31 19:33:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 19:33:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-10-31 19:33:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:12,426 INFO L225 Difference]: With dead ends: 88 [2024-10-31 19:33:12,427 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 19:33:12,427 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 [2024-10-31 19:33:12,428 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:12,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 484 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 19:33:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 19:33:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-10-31 19:33:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 19:33:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-10-31 19:33:12,435 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-10-31 19:33:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:12,436 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-10-31 19:33:12,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 19:33:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-10-31 19:33:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:33:12,437 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:12,437 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:12,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-10-31 19:33:12,642 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 [2024-10-31 19:33:12,643 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:12,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-10-31 19:33:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530348125] [2024-10-31 19:33:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:12,646 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) [2024-10-31 19:33:12,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-10-31 19:33:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:12,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 19:33:12,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 19:33:12,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 19:33:12,821 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530348125] [2024-10-31 19:33:12,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530348125] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:12,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-10-31 19:33:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737841920] [2024-10-31 19:33:12,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:12,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 19:33:12,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 19:33:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:12,823 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 19:33:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:12,881 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-10-31 19:33:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:33:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-10-31 19:33:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:12,883 INFO L225 Difference]: With dead ends: 117 [2024-10-31 19:33:12,883 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 19:33:12,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:12,884 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:12,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 467 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 19:33:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-10-31 19:33:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 19:33:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-10-31 19:33:12,898 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-10-31 19:33:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:12,898 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-10-31 19:33:12,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 19:33:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-10-31 19:33:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 19:33:12,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:12,901 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:12,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-10-31 19:33:13,102 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 [2024-10-31 19:33:13,102 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:13,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-10-31 19:33:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:13,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612430870] [2024-10-31 19:33:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:13,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:13,105 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) [2024-10-31 19:33:13,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-10-31 19:33:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:13,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 19:33:13,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:13,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:13,371 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612430870] [2024-10-31 19:33:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [612430870] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:13,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:13,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-10-31 19:33:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472846251] [2024-10-31 19:33:13,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:13,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 19:33:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 19:33:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-10-31 19:33:13,373 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) [2024-10-31 19:33:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:13,573 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2024-10-31 19:33:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 19:33:13,573 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 [2024-10-31 19:33:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:13,575 INFO L225 Difference]: With dead ends: 135 [2024-10-31 19:33:13,575 INFO L226 Difference]: Without dead ends: 128 [2024-10-31 19:33:13,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-31 19:33:13,576 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:13,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 817 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-31 19:33:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2024-10-31 19:33:13,597 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) [2024-10-31 19:33:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2024-10-31 19:33:13,598 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 44 [2024-10-31 19:33:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:13,598 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2024-10-31 19:33:13,598 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) [2024-10-31 19:33:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2024-10-31 19:33:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 19:33:13,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:13,599 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:13,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-10-31 19:33:13,799 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 [2024-10-31 19:33:13,800 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:13,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-10-31 19:33:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:13,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67108303] [2024-10-31 19:33:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:13,802 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) [2024-10-31 19:33:13,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-10-31 19:33:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:13,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 19:33:13,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:13,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:14,113 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67108303] [2024-10-31 19:33:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [67108303] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:14,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:14,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-10-31 19:33:14,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923411377] [2024-10-31 19:33:14,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:14,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 19:33:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 19:33:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-31 19:33:14,115 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) [2024-10-31 19:33:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:14,314 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2024-10-31 19:33:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 19:33:14,315 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 [2024-10-31 19:33:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:14,316 INFO L225 Difference]: With dead ends: 142 [2024-10-31 19:33:14,316 INFO L226 Difference]: Without dead ends: 134 [2024-10-31 19:33:14,317 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 [2024-10-31 19:33:14,318 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:14,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 543 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-31 19:33:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2024-10-31 19:33:14,329 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) [2024-10-31 19:33:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2024-10-31 19:33:14,330 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 46 [2024-10-31 19:33:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:14,330 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2024-10-31 19:33:14,330 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) [2024-10-31 19:33:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2024-10-31 19:33:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 19:33:14,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:14,332 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:14,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-10-31 19:33:14,533 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 [2024-10-31 19:33:14,534 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:14,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-10-31 19:33:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:14,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020558288] [2024-10-31 19:33:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:14,537 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) [2024-10-31 19:33:14,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-10-31 19:33:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:14,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:33:14,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 19:33:14,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 19:33:14,659 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:14,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020558288] [2024-10-31 19:33:14,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020558288] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:14,659 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:14,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-10-31 19:33:14,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474280763] [2024-10-31 19:33:14,660 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:14,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 19:33:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 19:33:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:33:14,661 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) [2024-10-31 19:33:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:14,691 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2024-10-31 19:33:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 19:33:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-10-31 19:33:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:14,693 INFO L225 Difference]: With dead ends: 130 [2024-10-31 19:33:14,693 INFO L226 Difference]: Without dead ends: 111 [2024-10-31 19:33:14,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 19:33:14,694 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 [2024-10-31 19:33:14,694 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] [2024-10-31 19:33:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-31 19:33:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-10-31 19:33:14,707 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) [2024-10-31 19:33:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2024-10-31 19:33:14,709 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 46 [2024-10-31 19:33:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:14,709 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2024-10-31 19:33:14,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 19:33:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2024-10-31 19:33:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 19:33:14,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:14,711 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:14,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:14,911 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 [2024-10-31 19:33:14,912 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:14,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-10-31 19:33:14,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:14,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975010775] [2024-10-31 19:33:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:14,913 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:14,914 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) [2024-10-31 19:33:14,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-10-31 19:33:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:14,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 19:33:14,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:15,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:15,346 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975010775] [2024-10-31 19:33:15,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975010775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:15,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:15,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 19:33:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974737767] [2024-10-31 19:33:15,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:15,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 19:33:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 19:33:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 19:33:15,348 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) [2024-10-31 19:33:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:16,183 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2024-10-31 19:33:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 19:33:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 19:33:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:16,184 INFO L225 Difference]: With dead ends: 150 [2024-10-31 19:33:16,184 INFO L226 Difference]: Without dead ends: 137 [2024-10-31 19:33:16,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 19:33:16,186 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 68 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:16,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1248 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 19:33:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-31 19:33:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2024-10-31 19:33:16,194 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) [2024-10-31 19:33:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2024-10-31 19:33:16,195 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 48 [2024-10-31 19:33:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:16,195 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2024-10-31 19:33:16,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 19:33:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2024-10-31 19:33:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 19:33:16,196 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:16,196 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:16,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-10-31 19:33:16,397 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 [2024-10-31 19:33:16,398 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:16,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-10-31 19:33:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482675255] [2024-10-31 19:33:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:16,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:16,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:16,399 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) [2024-10-31 19:33:16,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-10-31 19:33:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:16,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 19:33:16,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:16,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 19:33:16,835 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482675255] [2024-10-31 19:33:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482675255] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:16,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:16,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 19:33:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113046847] [2024-10-31 19:33:16,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:16,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 19:33:16,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 19:33:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 19:33:16,836 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) [2024-10-31 19:33:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:17,465 INFO L93 Difference]: Finished difference Result 148 states and 200 transitions. [2024-10-31 19:33:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 19:33:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 19:33:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:17,466 INFO L225 Difference]: With dead ends: 148 [2024-10-31 19:33:17,466 INFO L226 Difference]: Without dead ends: 121 [2024-10-31 19:33:17,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 19:33:17,468 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 86 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:17,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1021 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:33:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-31 19:33:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2024-10-31 19:33:17,475 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) [2024-10-31 19:33:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2024-10-31 19:33:17,475 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 48 [2024-10-31 19:33:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:17,476 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2024-10-31 19:33:17,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 19:33:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2024-10-31 19:33:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-31 19:33:17,477 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:17,477 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] [2024-10-31 19:33:17,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-10-31 19:33:17,677 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 [2024-10-31 19:33:17,677 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:17,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -700670325, now seen corresponding path program 1 times [2024-10-31 19:33:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830637887] [2024-10-31 19:33:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:17,678 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:17,679 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) [2024-10-31 19:33:17,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-10-31 19:33:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:17,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 19:33:17,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-31 19:33:17,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 19:33:17,909 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830637887] [2024-10-31 19:33:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [830637887] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 19:33:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 19:33:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-10-31 19:33:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015831973] [2024-10-31 19:33:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:17,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 19:33:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 19:33:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 19:33:17,911 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) [2024-10-31 19:33:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:18,017 INFO L93 Difference]: Finished difference Result 182 states and 249 transitions. [2024-10-31 19:33:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:18,017 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 [2024-10-31 19:33:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:18,018 INFO L225 Difference]: With dead ends: 182 [2024-10-31 19:33:18,018 INFO L226 Difference]: Without dead ends: 146 [2024-10-31 19:33:18,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-31 19:33:18,019 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 [2024-10-31 19:33:18,019 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] [2024-10-31 19:33:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-31 19:33:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2024-10-31 19:33:18,030 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) [2024-10-31 19:33:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 184 transitions. [2024-10-31 19:33:18,031 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 184 transitions. Word has length 53 [2024-10-31 19:33:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:18,031 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 184 transitions. [2024-10-31 19:33:18,031 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) [2024-10-31 19:33:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 184 transitions. [2024-10-31 19:33:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 19:33:18,032 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:18,032 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:18,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:18,232 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 [2024-10-31 19:33:18,233 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:18,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-10-31 19:33:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:18,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583936451] [2024-10-31 19:33:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:18,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:18,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:18,238 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) [2024-10-31 19:33:18,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-10-31 19:33:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:18,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:18,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 19:33:18,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 19:33:18,611 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:18,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583936451] [2024-10-31 19:33:18,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [583936451] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:18,611 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:18,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2024-10-31 19:33:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615139477] [2024-10-31 19:33:18,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:18,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 19:33:18,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 19:33:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-10-31 19:33:18,612 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) [2024-10-31 19:33:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:18,696 INFO L93 Difference]: Finished difference Result 154 states and 212 transitions. [2024-10-31 19:33:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:18,696 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 [2024-10-31 19:33:18,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:18,697 INFO L225 Difference]: With dead ends: 154 [2024-10-31 19:33:18,697 INFO L226 Difference]: Without dead ends: 132 [2024-10-31 19:33:18,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:33:18,698 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 [2024-10-31 19:33:18,698 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] [2024-10-31 19:33:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-31 19:33:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2024-10-31 19:33:18,705 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) [2024-10-31 19:33:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2024-10-31 19:33:18,706 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 49 [2024-10-31 19:33:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:18,706 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2024-10-31 19:33:18,706 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) [2024-10-31 19:33:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2024-10-31 19:33:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 19:33:18,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:18,707 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:18,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-10-31 19:33:18,908 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 [2024-10-31 19:33:18,908 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:18,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-10-31 19:33:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305931632] [2024-10-31 19:33:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:18,909 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:18,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:18,910 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) [2024-10-31 19:33:18,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-10-31 19:33:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:18,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:18,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:19,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:19,110 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:19,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305931632] [2024-10-31 19:33:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305931632] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:19,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:19,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 19:33:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885152483] [2024-10-31 19:33:19,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:19,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 19:33:19,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 19:33:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 19:33:19,113 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) [2024-10-31 19:33:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:19,207 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2024-10-31 19:33:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-10-31 19:33:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:19,208 INFO L225 Difference]: With dead ends: 136 [2024-10-31 19:33:19,208 INFO L226 Difference]: Without dead ends: 123 [2024-10-31 19:33:19,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 19:33:19,209 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 [2024-10-31 19:33:19,209 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] [2024-10-31 19:33:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-31 19:33:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-10-31 19:33:19,216 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) [2024-10-31 19:33:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2024-10-31 19:33:19,217 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 63 [2024-10-31 19:33:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:19,217 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2024-10-31 19:33:19,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 19:33:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2024-10-31 19:33:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 19:33:19,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:19,218 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:19,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-10-31 19:33:19,419 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 [2024-10-31 19:33:19,420 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:19,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 18588658, now seen corresponding path program 2 times [2024-10-31 19:33:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533800725] [2024-10-31 19:33:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:19,421 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:19,422 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) [2024-10-31 19:33:19,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-10-31 19:33:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:19,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:19,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:19,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:19,600 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533800725] [2024-10-31 19:33:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [533800725] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:19,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:19,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 19:33:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85970358] [2024-10-31 19:33:19,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:19,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 19:33:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 19:33:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 19:33:19,602 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) [2024-10-31 19:33:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:19,709 INFO L93 Difference]: Finished difference Result 134 states and 184 transitions. [2024-10-31 19:33:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-10-31 19:33:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:19,710 INFO L225 Difference]: With dead ends: 134 [2024-10-31 19:33:19,710 INFO L226 Difference]: Without dead ends: 123 [2024-10-31 19:33:19,711 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 [2024-10-31 19:33:19,711 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 [2024-10-31 19:33:19,711 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] [2024-10-31 19:33:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-31 19:33:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-10-31 19:33:19,720 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) [2024-10-31 19:33:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2024-10-31 19:33:19,721 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 63 [2024-10-31 19:33:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:19,721 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2024-10-31 19:33:19,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 19:33:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2024-10-31 19:33:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 19:33:19,722 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:19,722 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:19,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-10-31 19:33:19,923 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 [2024-10-31 19:33:19,923 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:19,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-10-31 19:33:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257369705] [2024-10-31 19:33:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:19,927 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) [2024-10-31 19:33:19,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-10-31 19:33:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:19,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:19,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:20,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:20,127 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257369705] [2024-10-31 19:33:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [257369705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:20,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:20,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 19:33:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757313108] [2024-10-31 19:33:20,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:20,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 19:33:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 19:33:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 19:33:20,128 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) [2024-10-31 19:33:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:20,225 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2024-10-31 19:33:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-10-31 19:33:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:20,227 INFO L225 Difference]: With dead ends: 134 [2024-10-31 19:33:20,227 INFO L226 Difference]: Without dead ends: 117 [2024-10-31 19:33:20,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 19:33:20,228 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 [2024-10-31 19:33:20,228 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] [2024-10-31 19:33:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-31 19:33:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-10-31 19:33:20,236 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) [2024-10-31 19:33:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2024-10-31 19:33:20,237 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 65 [2024-10-31 19:33:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:20,237 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2024-10-31 19:33:20,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 19:33:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2024-10-31 19:33:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 19:33:20,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:20,238 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:20,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:20,440 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 [2024-10-31 19:33:20,440 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:20,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1269391674, now seen corresponding path program 2 times [2024-10-31 19:33:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:20,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231733104] [2024-10-31 19:33:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:20,442 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) [2024-10-31 19:33:20,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-10-31 19:33:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:20,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:20,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:20,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 19:33:20,620 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:20,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231733104] [2024-10-31 19:33:20,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231733104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:20,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:20,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 19:33:20,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145249994] [2024-10-31 19:33:20,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:20,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 19:33:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 19:33:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 19:33:20,622 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) [2024-10-31 19:33:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:20,738 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2024-10-31 19:33:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 19:33:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-10-31 19:33:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:20,739 INFO L225 Difference]: With dead ends: 128 [2024-10-31 19:33:20,739 INFO L226 Difference]: Without dead ends: 114 [2024-10-31 19:33:20,739 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 [2024-10-31 19:33:20,740 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 [2024-10-31 19:33:20,740 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] [2024-10-31 19:33:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-31 19:33:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-10-31 19:33:20,755 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) [2024-10-31 19:33:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2024-10-31 19:33:20,756 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 156 transitions. Word has length 65 [2024-10-31 19:33:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:20,756 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 156 transitions. [2024-10-31 19:33:20,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 19:33:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 156 transitions. [2024-10-31 19:33:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 19:33:20,759 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:20,759 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:20,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-10-31 19:33:20,959 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 [2024-10-31 19:33:20,960 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:20,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 1 times [2024-10-31 19:33:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:20,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109320958] [2024-10-31 19:33:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:20,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:20,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:20,962 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) [2024-10-31 19:33:20,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-10-31 19:33:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:21,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 19:33:21,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 19:33:21,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 19:33:22,740 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109320958] [2024-10-31 19:33:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [109320958] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:22,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-10-31 19:33:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890425042] [2024-10-31 19:33:22,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:22,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-31 19:33:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-31 19:33:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-10-31 19:33:22,742 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) [2024-10-31 19:33:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:24,412 INFO L93 Difference]: Finished difference Result 177 states and 235 transitions. [2024-10-31 19:33:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-31 19:33:24,413 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 [2024-10-31 19:33:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:24,414 INFO L225 Difference]: With dead ends: 177 [2024-10-31 19:33:24,414 INFO L226 Difference]: Without dead ends: 160 [2024-10-31 19:33:24,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 19:33:24,415 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 53 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:24,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1109 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 19:33:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-31 19:33:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2024-10-31 19:33:24,424 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) [2024-10-31 19:33:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2024-10-31 19:33:24,424 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 72 [2024-10-31 19:33:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:24,425 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2024-10-31 19:33:24,425 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) [2024-10-31 19:33:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2024-10-31 19:33:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 19:33:24,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:24,426 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] [2024-10-31 19:33:24,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:24,628 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 [2024-10-31 19:33:24,628 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:24,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 1 times [2024-10-31 19:33:24,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:24,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667540663] [2024-10-31 19:33:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:24,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:24,630 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) [2024-10-31 19:33:24,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-10-31 19:33:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:24,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 19:33:24,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 19:33:25,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 19:33:26,244 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:26,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667540663] [2024-10-31 19:33:26,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667540663] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:26,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:26,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 19:33:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194378101] [2024-10-31 19:33:26,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:26,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 19:33:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 19:33:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-10-31 19:33:26,246 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) [2024-10-31 19:33:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:27,431 INFO L93 Difference]: Finished difference Result 183 states and 241 transitions. [2024-10-31 19:33:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 19:33:27,432 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 [2024-10-31 19:33:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:27,433 INFO L225 Difference]: With dead ends: 183 [2024-10-31 19:33:27,433 INFO L226 Difference]: Without dead ends: 169 [2024-10-31 19:33:27,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 19:33:27,434 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 35 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:27,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1003 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 19:33:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-31 19:33:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 150. [2024-10-31 19:33:27,446 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) [2024-10-31 19:33:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2024-10-31 19:33:27,447 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 74 [2024-10-31 19:33:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:27,447 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2024-10-31 19:33:27,447 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) [2024-10-31 19:33:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2024-10-31 19:33:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 19:33:27,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:27,448 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] [2024-10-31 19:33:27,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:27,648 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 [2024-10-31 19:33:27,648 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:27,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 564181814, now seen corresponding path program 1 times [2024-10-31 19:33:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302919549] [2024-10-31 19:33:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:27,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:27,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:27,651 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) [2024-10-31 19:33:27,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-10-31 19:33:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:27,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:33:27,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:27,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:27,758 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302919549] [2024-10-31 19:33:27,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302919549] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:27,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:27,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-10-31 19:33:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140737320] [2024-10-31 19:33:27,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:27,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:33:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:33:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:33:27,760 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) [2024-10-31 19:33:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:27,788 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2024-10-31 19:33:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 19:33:27,788 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 [2024-10-31 19:33:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:27,789 INFO L225 Difference]: With dead ends: 161 [2024-10-31 19:33:27,789 INFO L226 Difference]: Without dead ends: 156 [2024-10-31 19:33:27,789 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 [2024-10-31 19:33:27,789 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 [2024-10-31 19:33:27,790 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] [2024-10-31 19:33:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-31 19:33:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2024-10-31 19:33:27,804 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) [2024-10-31 19:33:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2024-10-31 19:33:27,804 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 74 [2024-10-31 19:33:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:27,805 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2024-10-31 19:33:27,805 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) [2024-10-31 19:33:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2024-10-31 19:33:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 19:33:27,806 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:27,806 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:27,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-10-31 19:33:28,006 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 [2024-10-31 19:33:28,006 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:28,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 2 times [2024-10-31 19:33:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:28,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380125680] [2024-10-31 19:33:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:28,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:28,008 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) [2024-10-31 19:33:28,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-10-31 19:33:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:28,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 19:33:28,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 19:33:28,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 19:33:29,631 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380125680] [2024-10-31 19:33:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [380125680] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:29,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-10-31 19:33:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113800378] [2024-10-31 19:33:29,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:29,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-31 19:33:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-31 19:33:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-10-31 19:33:29,633 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) [2024-10-31 19:33:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:31,342 INFO L93 Difference]: Finished difference Result 204 states and 273 transitions. [2024-10-31 19:33:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 19:33:31,343 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 [2024-10-31 19:33:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:31,344 INFO L225 Difference]: With dead ends: 204 [2024-10-31 19:33:31,344 INFO L226 Difference]: Without dead ends: 192 [2024-10-31 19:33:31,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2024-10-31 19:33:31,345 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 70 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:31,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1046 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 19:33:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-31 19:33:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2024-10-31 19:33:31,369 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) [2024-10-31 19:33:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2024-10-31 19:33:31,370 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 72 [2024-10-31 19:33:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:31,371 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2024-10-31 19:33:31,371 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) [2024-10-31 19:33:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2024-10-31 19:33:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 19:33:31,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:31,372 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] [2024-10-31 19:33:31,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:31,572 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 [2024-10-31 19:33:31,572 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:31,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1619502586, now seen corresponding path program 1 times [2024-10-31 19:33:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:31,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726878203] [2024-10-31 19:33:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:31,574 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) [2024-10-31 19:33:31,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-10-31 19:33:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:31,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 19:33:31,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:32,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:33:33,343 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:33,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726878203] [2024-10-31 19:33:33,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [726878203] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:33,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:33,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 19:33:33,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037564859] [2024-10-31 19:33:33,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:33,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 19:33:33,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 19:33:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-10-31 19:33:33,344 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) [2024-10-31 19:33:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:34,160 INFO L93 Difference]: Finished difference Result 202 states and 270 transitions. [2024-10-31 19:33:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 19:33:34,161 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 [2024-10-31 19:33:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:34,162 INFO L225 Difference]: With dead ends: 202 [2024-10-31 19:33:34,162 INFO L226 Difference]: Without dead ends: 188 [2024-10-31 19:33:34,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2024-10-31 19:33:34,163 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:34,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 853 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 19:33:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-10-31 19:33:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 169. [2024-10-31 19:33:34,190 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) [2024-10-31 19:33:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 226 transitions. [2024-10-31 19:33:34,191 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 226 transitions. Word has length 77 [2024-10-31 19:33:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:34,191 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 226 transitions. [2024-10-31 19:33:34,191 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) [2024-10-31 19:33:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 226 transitions. [2024-10-31 19:33:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-31 19:33:34,192 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:34,192 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] [2024-10-31 19:33:34,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-10-31 19:33:34,392 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 [2024-10-31 19:33:34,393 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:34,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash 624577500, now seen corresponding path program 1 times [2024-10-31 19:33:34,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:34,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787212819] [2024-10-31 19:33:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:34,393 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:34,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:34,394 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) [2024-10-31 19:33:34,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-10-31 19:33:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:34,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 19:33:34,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:34,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:34,491 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:34,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787212819] [2024-10-31 19:33:34,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787212819] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:34,491 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-10-31 19:33:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298518201] [2024-10-31 19:33:34,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:34,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 19:33:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 19:33:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 19:33:34,492 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) [2024-10-31 19:33:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:34,530 INFO L93 Difference]: Finished difference Result 183 states and 241 transitions. [2024-10-31 19:33:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 19:33:34,534 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 [2024-10-31 19:33:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:34,535 INFO L225 Difference]: With dead ends: 183 [2024-10-31 19:33:34,535 INFO L226 Difference]: Without dead ends: 174 [2024-10-31 19:33:34,535 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 [2024-10-31 19:33:34,535 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 [2024-10-31 19:33:34,536 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] [2024-10-31 19:33:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-31 19:33:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-10-31 19:33:34,556 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) [2024-10-31 19:33:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2024-10-31 19:33:34,557 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 76 [2024-10-31 19:33:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:34,557 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2024-10-31 19:33:34,557 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) [2024-10-31 19:33:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2024-10-31 19:33:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-31 19:33:34,558 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:34,558 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] [2024-10-31 19:33:34,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:34,759 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 [2024-10-31 19:33:34,759 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:34,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2024-10-31 19:33:34,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:34,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952638655] [2024-10-31 19:33:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:34,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:34,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:34,762 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) [2024-10-31 19:33:34,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-10-31 19:33:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:34,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 19:33:34,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:35,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:33:38,964 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952638655] [2024-10-31 19:33:38,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [952638655] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:38,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:38,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-10-31 19:33:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171086639] [2024-10-31 19:33:38,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:38,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-31 19:33:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-31 19:33:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 19:33:38,966 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) [2024-10-31 19:33:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:47,405 INFO L93 Difference]: Finished difference Result 217 states and 282 transitions. [2024-10-31 19:33:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-31 19:33:47,405 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 [2024-10-31 19:33:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:47,407 INFO L225 Difference]: With dead ends: 217 [2024-10-31 19:33:47,407 INFO L226 Difference]: Without dead ends: 204 [2024-10-31 19:33:47,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=468, Invalid=4644, Unknown=0, NotChecked=0, Total=5112 [2024-10-31 19:33:47,408 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.6s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:47,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1436 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-31 19:33:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-31 19:33:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 147. [2024-10-31 19:33:47,427 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) [2024-10-31 19:33:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2024-10-31 19:33:47,428 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 79 [2024-10-31 19:33:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:47,428 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2024-10-31 19:33:47,429 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) [2024-10-31 19:33:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2024-10-31 19:33:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-31 19:33:47,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:47,430 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] [2024-10-31 19:33:47,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-10-31 19:33:47,632 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 [2024-10-31 19:33:47,633 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:47,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -823382364, now seen corresponding path program 1 times [2024-10-31 19:33:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718238784] [2024-10-31 19:33:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:47,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:47,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:47,634 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) [2024-10-31 19:33:47,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-10-31 19:33:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:47,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 19:33:47,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:48,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:33:48,900 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718238784] [2024-10-31 19:33:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [718238784] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:48,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-10-31 19:33:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872531738] [2024-10-31 19:33:48,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:48,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 19:33:48,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 19:33:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-10-31 19:33:48,901 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) [2024-10-31 19:33:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:50,087 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2024-10-31 19:33:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 19:33:50,087 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 [2024-10-31 19:33:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:50,088 INFO L225 Difference]: With dead ends: 177 [2024-10-31 19:33:50,088 INFO L226 Difference]: Without dead ends: 126 [2024-10-31 19:33:50,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 19:33:50,089 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 51 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:50,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1109 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 19:33:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-31 19:33:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2024-10-31 19:33:50,102 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) [2024-10-31 19:33:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2024-10-31 19:33:50,103 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 78 [2024-10-31 19:33:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:50,103 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2024-10-31 19:33:50,103 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) [2024-10-31 19:33:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2024-10-31 19:33:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 19:33:50,104 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:50,104 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] [2024-10-31 19:33:50,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:50,307 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 [2024-10-31 19:33:50,307 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:50,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 1 times [2024-10-31 19:33:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162002147] [2024-10-31 19:33:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:50,309 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) [2024-10-31 19:33:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-10-31 19:33:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:50,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-31 19:33:50,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:51,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:33:53,085 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:53,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162002147] [2024-10-31 19:33:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162002147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:53,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2024-10-31 19:33:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031130861] [2024-10-31 19:33:53,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:53,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-31 19:33:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-31 19:33:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 19:33:53,086 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) [2024-10-31 19:33:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:55,375 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2024-10-31 19:33:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 19:33:55,377 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 [2024-10-31 19:33:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:55,377 INFO L225 Difference]: With dead ends: 164 [2024-10-31 19:33:55,378 INFO L226 Difference]: Without dead ends: 144 [2024-10-31 19:33:55,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2024-10-31 19:33:55,379 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 63 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:55,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1053 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-31 19:33:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-31 19:33:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2024-10-31 19:33:55,406 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) [2024-10-31 19:33:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2024-10-31 19:33:55,406 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 81 [2024-10-31 19:33:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:55,407 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2024-10-31 19:33:55,407 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) [2024-10-31 19:33:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2024-10-31 19:33:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-31 19:33:55,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:55,407 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] [2024-10-31 19:33:55,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2024-10-31 19:33:55,608 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 [2024-10-31 19:33:55,608 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:55,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2024-10-31 19:33:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:55,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349428113] [2024-10-31 19:33:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:55,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:55,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:55,611 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) [2024-10-31 19:33:55,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-10-31 19:33:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:55,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 19:33:55,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:33:56,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:33:58,127 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:58,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349428113] [2024-10-31 19:33:58,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [349428113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:58,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:58,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2024-10-31 19:33:58,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853029114] [2024-10-31 19:33:58,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:58,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-31 19:33:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-31 19:33:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-10-31 19:33:58,129 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) [2024-10-31 19:34:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:01,259 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2024-10-31 19:34:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-31 19:34:01,260 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 [2024-10-31 19:34:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:01,261 INFO L225 Difference]: With dead ends: 184 [2024-10-31 19:34:01,261 INFO L226 Difference]: Without dead ends: 167 [2024-10-31 19:34:01,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2024-10-31 19:34:01,262 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 86 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:01,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1070 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-31 19:34:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-31 19:34:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2024-10-31 19:34:01,283 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) [2024-10-31 19:34:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2024-10-31 19:34:01,284 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 79 [2024-10-31 19:34:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:01,284 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2024-10-31 19:34:01,284 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) [2024-10-31 19:34:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2024-10-31 19:34:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-31 19:34:01,285 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:01,285 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] [2024-10-31 19:34:01,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-10-31 19:34:01,485 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 [2024-10-31 19:34:01,485 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:01,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 1 times [2024-10-31 19:34:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750765648] [2024-10-31 19:34:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:01,487 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) [2024-10-31 19:34:01,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-10-31 19:34:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:01,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:34:01,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:01,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:01,799 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:01,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750765648] [2024-10-31 19:34:01,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [750765648] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:01,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-10-31 19:34:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455369096] [2024-10-31 19:34:01,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:01,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 19:34:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 19:34:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:34:01,801 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) [2024-10-31 19:34:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:02,032 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2024-10-31 19:34:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:34:02,032 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 [2024-10-31 19:34:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:02,033 INFO L225 Difference]: With dead ends: 164 [2024-10-31 19:34:02,033 INFO L226 Difference]: Without dead ends: 141 [2024-10-31 19:34:02,033 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 [2024-10-31 19:34:02,034 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:02,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 716 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:34:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-31 19:34:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2024-10-31 19:34:02,053 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) [2024-10-31 19:34:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2024-10-31 19:34:02,054 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 82 [2024-10-31 19:34:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:02,054 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2024-10-31 19:34:02,054 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) [2024-10-31 19:34:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2024-10-31 19:34:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 19:34:02,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:02,055 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] [2024-10-31 19:34:02,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2024-10-31 19:34:02,255 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 [2024-10-31 19:34:02,256 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:02,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1126803066, now seen corresponding path program 2 times [2024-10-31 19:34:02,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:02,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750359907] [2024-10-31 19:34:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:02,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:02,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:02,258 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) [2024-10-31 19:34:02,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-10-31 19:34:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:02,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 19:34:02,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:34:02,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:04,239 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:04,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750359907] [2024-10-31 19:34:04,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [750359907] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:04,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:04,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 19:34:04,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074728701] [2024-10-31 19:34:04,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:04,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 19:34:04,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 19:34:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-10-31 19:34:04,240 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) [2024-10-31 19:34:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:05,575 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2024-10-31 19:34:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 19:34:05,576 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 [2024-10-31 19:34:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:05,577 INFO L225 Difference]: With dead ends: 164 [2024-10-31 19:34:05,577 INFO L226 Difference]: Without dead ends: 155 [2024-10-31 19:34:05,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 19:34:05,578 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, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:05,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 977 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 19:34:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-31 19:34:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2024-10-31 19:34:05,605 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) [2024-10-31 19:34:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2024-10-31 19:34:05,606 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 77 [2024-10-31 19:34:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:05,606 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2024-10-31 19:34:05,606 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) [2024-10-31 19:34:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2024-10-31 19:34:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-10-31 19:34:05,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:05,607 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] [2024-10-31 19:34:05,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2024-10-31 19:34:05,807 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 [2024-10-31 19:34:05,807 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:05,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2024-10-31 19:34:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899560540] [2024-10-31 19:34:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:05,809 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) [2024-10-31 19:34:05,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-10-31 19:34:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:06,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-31 19:34:06,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 19:34:07,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 19:34:12,089 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:12,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899560540] [2024-10-31 19:34:12,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899560540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:12,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:12,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2024-10-31 19:34:12,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745615092] [2024-10-31 19:34:12,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:12,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-31 19:34:12,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:12,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-31 19:34:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2024-10-31 19:34:12,091 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) [2024-10-31 19:34:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:24,564 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2024-10-31 19:34:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-31 19:34:24,566 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 [2024-10-31 19:34:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:24,567 INFO L225 Difference]: With dead ends: 168 [2024-10-31 19:34:24,567 INFO L226 Difference]: Without dead ends: 159 [2024-10-31 19:34:24,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=441, Invalid=4529, Unknown=0, NotChecked=0, Total=4970 [2024-10-31 19:34:24,568 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:24,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1446 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-10-31 19:34:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-10-31 19:34:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2024-10-31 19:34:24,592 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) [2024-10-31 19:34:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2024-10-31 19:34:24,593 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 84 [2024-10-31 19:34:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:24,593 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2024-10-31 19:34:24,593 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) [2024-10-31 19:34:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2024-10-31 19:34:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-31 19:34:24,594 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:24,594 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] [2024-10-31 19:34:24,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2024-10-31 19:34:24,794 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 [2024-10-31 19:34:24,795 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:24,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -411611933, now seen corresponding path program 1 times [2024-10-31 19:34:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807126980] [2024-10-31 19:34:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:24,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:24,797 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) [2024-10-31 19:34:24,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-10-31 19:34:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:24,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 19:34:24,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:24,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:25,111 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807126980] [2024-10-31 19:34:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807126980] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:25,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:25,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-10-31 19:34:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702103581] [2024-10-31 19:34:25,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:25,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 19:34:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 19:34:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-31 19:34:25,113 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) [2024-10-31 19:34:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:25,395 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2024-10-31 19:34:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 19:34:25,395 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 [2024-10-31 19:34:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:25,396 INFO L225 Difference]: With dead ends: 155 [2024-10-31 19:34:25,396 INFO L226 Difference]: Without dead ends: 148 [2024-10-31 19:34:25,397 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 [2024-10-31 19:34:25,397 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 69 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-10-31 19:34:25,397 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] [2024-10-31 19:34:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-31 19:34:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2024-10-31 19:34:25,421 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) [2024-10-31 19:34:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2024-10-31 19:34:25,422 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 80 [2024-10-31 19:34:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:25,422 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2024-10-31 19:34:25,423 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) [2024-10-31 19:34:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2024-10-31 19:34:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-31 19:34:25,423 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:25,423 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] [2024-10-31 19:34:25,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2024-10-31 19:34:25,624 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 [2024-10-31 19:34:25,624 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:25,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625504, now seen corresponding path program 2 times [2024-10-31 19:34:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023336934] [2024-10-31 19:34:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:25,625 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:25,626 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) [2024-10-31 19:34:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-10-31 19:34:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:25,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 19:34:25,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 19:34:26,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 19:34:26,938 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023336934] [2024-10-31 19:34:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023336934] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:26,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-10-31 19:34:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455752783] [2024-10-31 19:34:26,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:26,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 19:34:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 19:34:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-31 19:34:26,939 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) [2024-10-31 19:34:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:27,788 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2024-10-31 19:34:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 19:34:27,789 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 [2024-10-31 19:34:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:27,790 INFO L225 Difference]: With dead ends: 172 [2024-10-31 19:34:27,790 INFO L226 Difference]: Without dead ends: 138 [2024-10-31 19:34:27,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 19:34:27,790 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:27,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 978 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 19:34:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-31 19:34:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-10-31 19:34:27,814 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) [2024-10-31 19:34:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2024-10-31 19:34:27,815 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 78 [2024-10-31 19:34:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:27,815 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2024-10-31 19:34:27,815 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) [2024-10-31 19:34:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2024-10-31 19:34:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-31 19:34:27,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:27,816 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] [2024-10-31 19:34:27,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-10-31 19:34:28,017 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 [2024-10-31 19:34:28,017 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:28,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 1 times [2024-10-31 19:34:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404943415] [2024-10-31 19:34:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:28,022 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) [2024-10-31 19:34:28,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-10-31 19:34:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:28,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-31 19:34:28,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 19:34:29,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 19:34:35,347 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404943415] [2024-10-31 19:34:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [404943415] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:35,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2024-10-31 19:34:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346497117] [2024-10-31 19:34:35,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:35,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-31 19:34:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-31 19:34:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2171, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 19:34:35,349 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 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) [2024-10-31 19:34:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:43,205 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2024-10-31 19:34:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-31 19:34:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 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 86 [2024-10-31 19:34:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:43,207 INFO L225 Difference]: With dead ends: 149 [2024-10-31 19:34:43,207 INFO L226 Difference]: Without dead ends: 132 [2024-10-31 19:34:43,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=285, Invalid=3497, Unknown=0, NotChecked=0, Total=3782 [2024-10-31 19:34:43,208 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:43,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1333 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-10-31 19:34:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-31 19:34:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-10-31 19:34:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 102 states have internal predecessors, (112), 20 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (27), 20 states have call predecessors, (27), 19 states have call successors, (27) [2024-10-31 19:34:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2024-10-31 19:34:43,230 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2024-10-31 19:34:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:43,231 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2024-10-31 19:34:43,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 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) [2024-10-31 19:34:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2024-10-31 19:34:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-31 19:34:43,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:43,231 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] [2024-10-31 19:34:43,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-10-31 19:34:43,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:43,432 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:43,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 2 times [2024-10-31 19:34:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630805277] [2024-10-31 19:34:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:43,433 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:43,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:43,434 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:34:43,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2024-10-31 19:34:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:43,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-31 19:34:43,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 19:34:45,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 19:34:50,939 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630805277] [2024-10-31 19:34:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630805277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:50,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:50,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2024-10-31 19:34:50,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234719877] [2024-10-31 19:34:50,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:50,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-31 19:34:50,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-31 19:34:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 19:34:50,940 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 49 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 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)