/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 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 22:40:47,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 22:40:47,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 22:40:47,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 22:40:47,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 22:40:47,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 22:40:47,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 22:40:47,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 22:40:47,768 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 22:40:47,771 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 22:40:47,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 22:40:47,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 22:40:47,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 22:40:47,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 22:40:47,772 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 22:40:47,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 22:40:47,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 22:40:47,772 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 22:40:47,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 22:40:47,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 22:40:47,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 22:40:47,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 22:40:47,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 22:40:47,775 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 22:40:47,775 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 22:40:47,776 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 22:40:47,776 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 22:40:47,776 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 22:40:47,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 22:40:47,776 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 22:40:47,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:40:47,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 22:40:47,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 22:40:47,778 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 22:40:47,778 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 22:40:47,778 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 22:40:47,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 22:40:47,779 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 22:40:47,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 22:40:47,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:47,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 22:40:47,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 22:40:47,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 22:40:47,970 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 22:40:47,970 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 22:40:47,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-02 22:40:49,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 22:40:49,322 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 22:40:49,323 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-11-02 22:40:49,329 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18844d3f/babe15ce5a204284aa805506dc061ab4/FLAGb00d6b95c [2024-11-02 22:40:49,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18844d3f/babe15ce5a204284aa805506dc061ab4 [2024-11-02 22:40:49,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 22:40:49,705 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 22:40:49,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 22:40:49,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 22:40:49,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 22:40:49,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ab3de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49, skipping insertion in model container [2024-11-02 22:40:49,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 22:40:49,848 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 22:40:49,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:40:49,888 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 22:40:49,896 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-02 22:40:49,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 22:40:49,925 INFO L204 MainTranslator]: Completed translation [2024-11-02 22:40:49,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49 WrapperNode [2024-11-02 22:40:49,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 22:40:49,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 22:40:49,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 22:40:49,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 22:40:49,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,949 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-02 22:40:49,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 22:40:49,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 22:40:49,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 22:40:49,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 22:40:49,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,974 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-02 22:40:49,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,983 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,985 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 22:40:49,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 22:40:49,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 22:40:49,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 22:40:49,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (1/1) ... [2024-11-02 22:40:49,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 22:40:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:50,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-02 22:40:50,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-02 22:40:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 22:40:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 22:40:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 22:40:50,039 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 22:40:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 22:40:50,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 22:40:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-02 22:40:50,039 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-02 22:40:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 22:40:50,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 22:40:50,121 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 22:40:50,124 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 22:40:50,304 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-02 22:40:50,304 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 22:40:50,314 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 22:40:50,314 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 22:40:50,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:50 BoogieIcfgContainer [2024-11-02 22:40:50,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 22:40:50,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 22:40:50,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 22:40:50,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 22:40:50,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:40:49" (1/3) ... [2024-11-02 22:40:50,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6066ac14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:50, skipping insertion in model container [2024-11-02 22:40:50,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:49" (2/3) ... [2024-11-02 22:40:50,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6066ac14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:50, skipping insertion in model container [2024-11-02 22:40:50,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:50" (3/3) ... [2024-11-02 22:40:50,321 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-02 22:40:50,331 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 22:40:50,332 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 22:40:50,365 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 22:40:50,369 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;@1a4544fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 22:40:50,369 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 22:40:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 22:40:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 22:40:50,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:50,380 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:50,380 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:50,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-11-02 22:40:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:50,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474499884] [2024-11-02 22:40:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:50,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:50,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 22:40:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:50,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 22:40:50,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:50,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:50,641 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:50,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474499884] [2024-11-02 22:40:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474499884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:50,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-02 22:40:50,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475220091] [2024-11-02 22:40:50,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:50,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 22:40:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 22:40:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:50,663 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 22:40:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:50,797 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-11-02 22:40:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 22:40:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-02 22:40:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:50,809 INFO L225 Difference]: With dead ends: 128 [2024-11-02 22:40:50,809 INFO L226 Difference]: Without dead ends: 71 [2024-11-02 22:40:50,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 22:40:50,815 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:50,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:40:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-02 22:40:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-02 22:40:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-02 22:40:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-11-02 22:40:50,849 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-11-02 22:40:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:50,849 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-11-02 22:40:50,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 22:40:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-11-02 22:40:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 22:40:50,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:50,851 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:50,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 22:40:51,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:51,052 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:51,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-11-02 22:40:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253575654] [2024-11-02 22:40:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:51,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:51,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:51,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:51,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 22:40:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:51,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 22:40:51,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:51,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:51,245 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253575654] [2024-11-02 22:40:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253575654] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:40:51,246 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:40:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2024-11-02 22:40:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798020471] [2024-11-02 22:40:51,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:51,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:40:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:40:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 22:40:51,248 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 22:40:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:51,312 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-11-02 22:40:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 22:40:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-02 22:40:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:51,314 INFO L225 Difference]: With dead ends: 118 [2024-11-02 22:40:51,314 INFO L226 Difference]: Without dead ends: 86 [2024-11-02 22:40:51,314 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 [2024-11-02 22:40:51,315 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 [2024-11-02 22:40:51,316 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] [2024-11-02 22:40:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-02 22:40:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-11-02 22:40:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-02 22:40:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-11-02 22:40:51,328 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-11-02 22:40:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:51,328 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-11-02 22:40:51,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 22:40:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-11-02 22:40:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 22:40:51,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:51,331 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:51,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 22:40:51,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:51,532 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:51,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-11-02 22:40:51,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:51,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344638026] [2024-11-02 22:40:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:51,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:51,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:51,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 22:40:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:51,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 22:40:51,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:51,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:51,767 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:51,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344638026] [2024-11-02 22:40:51,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [344638026] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:40:51,768 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:40:51,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-11-02 22:40:51,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023967888] [2024-11-02 22:40:51,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:51,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 22:40:51,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 22:40:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:51,769 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:40:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:51,857 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-11-02 22:40:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 22:40:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-02 22:40:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:51,859 INFO L225 Difference]: With dead ends: 108 [2024-11-02 22:40:51,859 INFO L226 Difference]: Without dead ends: 85 [2024-11-02 22:40:51,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 22:40:51,860 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 [2024-11-02 22:40:51,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 501 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:40:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-02 22:40:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-11-02 22:40:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 22:40:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-11-02 22:40:51,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-11-02 22:40:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:51,874 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-11-02 22:40:51,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:40:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-11-02 22:40:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 22:40:51,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:51,876 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:51,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 22:40:52,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:52,077 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:52,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-11-02 22:40:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:52,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177819042] [2024-11-02 22:40:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:52,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:52,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:52,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:52,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 22:40:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:52,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 22:40:52,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:40:52,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:40:52,292 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177819042] [2024-11-02 22:40:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177819042] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:40:52,293 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:40:52,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-02 22:40:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177804879] [2024-11-02 22:40:52,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:52,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 22:40:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 22:40:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 22:40:52,294 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 22:40:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:53,109 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2024-11-02 22:40:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 22:40:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-02 22:40:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:53,110 INFO L225 Difference]: With dead ends: 88 [2024-11-02 22:40:53,110 INFO L226 Difference]: Without dead ends: 86 [2024-11-02 22:40:53,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:40:53,112 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 [2024-11-02 22:40:53,112 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] [2024-11-02 22:40:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-02 22:40:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-11-02 22:40:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 22:40:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-11-02 22:40:53,120 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-11-02 22:40:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:53,120 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-11-02 22:40:53,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 22:40:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-11-02 22:40:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 22:40:53,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:53,122 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:53,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 22:40:53,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:53,323 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:53,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-11-02 22:40:53,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:53,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455294497] [2024-11-02 22:40:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:53,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:53,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:53,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 22:40:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:53,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 22:40:53,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:53,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:53,498 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:53,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455294497] [2024-11-02 22:40:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455294497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:53,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:53,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-02 22:40:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660071474] [2024-11-02 22:40:53,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:53,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 22:40:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 22:40:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:53,499 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 22:40:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:53,575 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-11-02 22:40:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 22:40:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-02 22:40:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:53,577 INFO L225 Difference]: With dead ends: 117 [2024-11-02 22:40:53,577 INFO L226 Difference]: Without dead ends: 106 [2024-11-02 22:40:53,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:53,578 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:53,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 467 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:40:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-02 22:40:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-11-02 22:40:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-02 22:40:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-11-02 22:40:53,589 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-11-02 22:40:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:53,589 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-11-02 22:40:53,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 22:40:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-11-02 22:40:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 22:40:53,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:53,590 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:53,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 22:40:53,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:53,791 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:53,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-11-02 22:40:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:53,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539764275] [2024-11-02 22:40:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:53,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:53,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 22:40:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:53,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 22:40:53,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:53,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:54,038 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:54,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539764275] [2024-11-02 22:40:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539764275] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:40:54,038 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:40:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2024-11-02 22:40:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308222380] [2024-11-02 22:40:54,039 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:54,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 22:40:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 22:40:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-02 22:40:54,041 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), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-02 22:40:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:54,210 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2024-11-02 22:40:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 22:40:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-11-02 22:40:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:54,211 INFO L225 Difference]: With dead ends: 131 [2024-11-02 22:40:54,211 INFO L226 Difference]: Without dead ends: 124 [2024-11-02 22:40:54,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:40:54,213 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 35 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:54,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 625 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:40:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-02 22:40:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2024-11-02 22:40:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-02 22:40:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2024-11-02 22:40:54,232 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2024-11-02 22:40:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:54,232 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2024-11-02 22:40:54,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-02 22:40:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2024-11-02 22:40:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 22:40:54,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:54,234 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:54,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 22:40:54,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:54,435 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:54,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-11-02 22:40:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:54,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111198486] [2024-11-02 22:40:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:54,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:54,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 22:40:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:54,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 22:40:54,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:54,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 22:40:54,680 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111198486] [2024-11-02 22:40:54,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111198486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:54,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:54,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-02 22:40:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317038708] [2024-11-02 22:40:54,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:54,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 22:40:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 22:40:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-02 22:40:54,682 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:40:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:54,865 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-11-02 22:40:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 22:40:54,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-11-02 22:40:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:54,867 INFO L225 Difference]: With dead ends: 138 [2024-11-02 22:40:54,867 INFO L226 Difference]: Without dead ends: 130 [2024-11-02 22:40:54,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:40:54,868 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 23 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:54,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 728 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:40:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-02 22:40:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2024-11-02 22:40:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-02 22:40:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-11-02 22:40:54,878 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2024-11-02 22:40:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:54,878 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-11-02 22:40:54,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:40:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-11-02 22:40:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 22:40:54,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:54,879 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:54,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 22:40:55,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:55,080 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:55,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:55,081 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-11-02 22:40:55,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:55,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985460872] [2024-11-02 22:40:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:55,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:55,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 22:40:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:55,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 22:40:55,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 22:40:55,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 22:40:55,190 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985460872] [2024-11-02 22:40:55,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [985460872] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:40:55,190 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:40:55,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-02 22:40:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471364919] [2024-11-02 22:40:55,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:55,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:40:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:40:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 22:40:55,191 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 22:40:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:55,226 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-11-02 22:40:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 22:40:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-02 22:40:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:55,228 INFO L225 Difference]: With dead ends: 118 [2024-11-02 22:40:55,228 INFO L226 Difference]: Without dead ends: 103 [2024-11-02 22:40:55,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:55,244 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:55,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:40:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-02 22:40:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-02 22:40:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 80 states have internal predecessors, (93), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-02 22:40:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2024-11-02 22:40:55,255 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 46 [2024-11-02 22:40:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:55,255 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2024-11-02 22:40:55,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 22:40:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2024-11-02 22:40:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 22:40:55,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:55,256 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:55,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-02 22:40:55,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:55,457 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:55,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-11-02 22:40:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490631318] [2024-11-02 22:40:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:55,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:55,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:55,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:55,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 22:40:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:55,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 22:40:55,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:55,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:55,880 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:55,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490631318] [2024-11-02 22:40:55,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [490631318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:55,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:55,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-02 22:40:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641030537] [2024-11-02 22:40:55,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:55,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 22:40:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 22:40:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-02 22:40:55,881 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:40:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:56,669 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2024-11-02 22:40:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-02 22:40:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-02 22:40:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:56,671 INFO L225 Difference]: With dead ends: 150 [2024-11-02 22:40:56,671 INFO L226 Difference]: Without dead ends: 137 [2024-11-02 22:40:56,672 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 [2024-11-02 22:40:56,673 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:56,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1234 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 22:40:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-02 22:40:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2024-11-02 22:40:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 86 states have internal predecessors, (98), 16 states have call successors, (16), 7 states have call predecessors, (16), 12 states have return successors, (29), 16 states have call predecessors, (29), 14 states have call successors, (29) [2024-11-02 22:40:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-11-02 22:40:56,681 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 48 [2024-11-02 22:40:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:56,681 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-11-02 22:40:56,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:40:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-11-02 22:40:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 22:40:56,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:56,682 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:56,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-02 22:40:56,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:56,886 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:56,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-11-02 22:40:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:56,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524262696] [2024-11-02 22:40:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:56,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:56,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 22:40:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:56,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 22:40:56,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:57,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:57,283 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524262696] [2024-11-02 22:40:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [524262696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:57,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:57,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-02 22:40:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412035099] [2024-11-02 22:40:57,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:57,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 22:40:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 22:40:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-02 22:40:57,285 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:40:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:57,988 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2024-11-02 22:40:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 22:40:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-02 22:40:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:57,990 INFO L225 Difference]: With dead ends: 149 [2024-11-02 22:40:57,990 INFO L226 Difference]: Without dead ends: 134 [2024-11-02 22:40:57,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-02 22:40:57,991 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 71 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:57,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1260 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:40:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-02 22:40:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-11-02 22:40:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-02 22:40:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 143 transitions. [2024-11-02 22:40:58,005 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 143 transitions. Word has length 48 [2024-11-02 22:40:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:58,005 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 143 transitions. [2024-11-02 22:40:58,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:40:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 143 transitions. [2024-11-02 22:40:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 22:40:58,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:58,006 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:58,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-02 22:40:58,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:58,207 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:58,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash -700670325, now seen corresponding path program 1 times [2024-11-02 22:40:58,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:58,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380501716] [2024-11-02 22:40:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:58,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:58,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-02 22:40:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:58,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 22:40:58,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 22:40:58,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 22:40:58,313 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380501716] [2024-11-02 22:40:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380501716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:58,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:58,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-02 22:40:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622776866] [2024-11-02 22:40:58,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:58,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:40:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:40:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 22:40:58,315 INFO L87 Difference]: Start difference. First operand 108 states and 143 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:40:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:58,360 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-11-02 22:40:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 22:40:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2024-11-02 22:40:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:58,361 INFO L225 Difference]: With dead ends: 151 [2024-11-02 22:40:58,361 INFO L226 Difference]: Without dead ends: 96 [2024-11-02 22:40:58,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 22:40:58,362 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:58,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 451 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:40:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-02 22:40:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-02 22:40:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 75 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 14 states have call predecessors, (28), 13 states have call successors, (28) [2024-11-02 22:40:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2024-11-02 22:40:58,371 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 53 [2024-11-02 22:40:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:58,371 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2024-11-02 22:40:58,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:40:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2024-11-02 22:40:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 22:40:58,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:58,372 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:58,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-02 22:40:58,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:58,573 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:58,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-11-02 22:40:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:58,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726968548] [2024-11-02 22:40:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:58,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:58,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-02 22:40:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:58,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 22:40:58,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:40:58,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:40:59,023 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726968548] [2024-11-02 22:40:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [726968548] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 22:40:59,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 22:40:59,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-11-02 22:40:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969101247] [2024-11-02 22:40:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 22:40:59,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 22:40:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 22:40:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-02 22:40:59,025 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:40:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:40:59,366 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2024-11-02 22:40:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 22:40:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-02 22:40:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:40:59,368 INFO L225 Difference]: With dead ends: 110 [2024-11-02 22:40:59,368 INFO L226 Difference]: Without dead ends: 108 [2024-11-02 22:40:59,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-02 22:40:59,368 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 22:40:59,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 301 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 22:40:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-02 22:40:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2024-11-02 22:40:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 15 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2024-11-02 22:40:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2024-11-02 22:40:59,378 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 49 [2024-11-02 22:40:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:40:59,378 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2024-11-02 22:40:59,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:40:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2024-11-02 22:40:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 22:40:59,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:40:59,379 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:40:59,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-02 22:40:59,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:59,580 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:40:59,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:40:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2024-11-02 22:40:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:40:59,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648196896] [2024-11-02 22:40:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:40:59,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:40:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:40:59,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:40:59,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-02 22:40:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:40:59,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 22:40:59,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:40:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:59,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:40:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 22:40:59,847 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:40:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648196896] [2024-11-02 22:40:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648196896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:40:59,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:40:59,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-02 22:40:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155789384] [2024-11-02 22:40:59,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:40:59,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 22:40:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:40:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 22:40:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:40:59,848 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:41:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:00,023 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2024-11-02 22:41:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 22:41:00,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 50 [2024-11-02 22:41:00,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:00,025 INFO L225 Difference]: With dead ends: 133 [2024-11-02 22:41:00,025 INFO L226 Difference]: Without dead ends: 106 [2024-11-02 22:41:00,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-02 22:41:00,026 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 30 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:00,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 601 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-02 22:41:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-11-02 22:41:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2024-11-02 22:41:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-11-02 22:41:00,038 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 50 [2024-11-02 22:41:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:00,038 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-11-02 22:41:00,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 22:41:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-11-02 22:41:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 22:41:00,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:00,040 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:00,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-02 22:41:00,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:00,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:00,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2024-11-02 22:41:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:00,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905430720] [2024-11-02 22:41:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:00,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:00,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:00,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:00,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-02 22:41:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:00,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 22:41:00,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:41:07,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 22:41:09,297 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905430720] [2024-11-02 22:41:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [905430720] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 22:41:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 22:41:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2024-11-02 22:41:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718971817] [2024-11-02 22:41:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 22:41:09,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 22:41:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 22:41:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=210, Unknown=3, NotChecked=0, Total=272 [2024-11-02 22:41:09,298 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:41:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:09,454 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2024-11-02 22:41:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 22:41:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-02 22:41:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:09,455 INFO L225 Difference]: With dead ends: 98 [2024-11-02 22:41:09,455 INFO L226 Difference]: Without dead ends: 94 [2024-11-02 22:41:09,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=72, Invalid=267, Unknown=3, NotChecked=0, Total=342 [2024-11-02 22:41:09,456 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 19 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:09,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-02 22:41:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-11-02 22:41:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-11-02 22:41:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2024-11-02 22:41:09,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2024-11-02 22:41:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:09,461 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2024-11-02 22:41:09,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 22:41:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2024-11-02 22:41:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 22:41:09,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:09,462 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:09,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-02 22:41:09,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:09,663 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:09,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2024-11-02 22:41:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:09,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379967745] [2024-11-02 22:41:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:09,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:09,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:09,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:09,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-02 22:41:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:09,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:41:09,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:09,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:09,827 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379967745] [2024-11-02 22:41:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [379967745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:09,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 22:41:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525499906] [2024-11-02 22:41:09,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:09,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 22:41:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 22:41:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:41:09,829 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 22:41:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:09,939 INFO L93 Difference]: Finished difference Result 111 states and 163 transitions. [2024-11-02 22:41:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 22:41:09,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-02 22:41:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:09,940 INFO L225 Difference]: With dead ends: 111 [2024-11-02 22:41:09,941 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 22:41:09,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-02 22:41:09,941 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 40 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:09,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 483 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 22:41:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-11-02 22:41:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2024-11-02 22:41:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2024-11-02 22:41:09,947 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 54 [2024-11-02 22:41:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:09,947 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2024-11-02 22:41:09,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 22:41:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2024-11-02 22:41:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 22:41:09,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:09,948 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:09,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:10,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:10,149 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:10,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-11-02 22:41:10,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:10,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180951358] [2024-11-02 22:41:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:10,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:10,151 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:10,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-02 22:41:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:10,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:41:10,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:10,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:10,339 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180951358] [2024-11-02 22:41:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180951358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:10,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 22:41:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598297713] [2024-11-02 22:41:10,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:10,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 22:41:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 22:41:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:41:10,340 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:41:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:10,438 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2024-11-02 22:41:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 22:41:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-02 22:41:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:10,440 INFO L225 Difference]: With dead ends: 111 [2024-11-02 22:41:10,440 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 22:41:10,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-02 22:41:10,441 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 27 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:10,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 535 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 22:41:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-11-02 22:41:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2024-11-02 22:41:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-11-02 22:41:10,447 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 63 [2024-11-02 22:41:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:10,447 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-11-02 22:41:10,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:41:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-11-02 22:41:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 22:41:10,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:10,448 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:10,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:10,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:10,649 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:10,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2024-11-02 22:41:10,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:10,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704733286] [2024-11-02 22:41:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:10,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:10,651 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:10,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-02 22:41:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:10,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 22:41:10,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:10,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:10,957 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:10,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704733286] [2024-11-02 22:41:10,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [704733286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:10,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:10,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-02 22:41:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819242904] [2024-11-02 22:41:10,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:10,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-02 22:41:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-02 22:41:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-02 22:41:10,959 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 22:41:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:11,526 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2024-11-02 22:41:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 22:41:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-11-02 22:41:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:11,528 INFO L225 Difference]: With dead ends: 119 [2024-11-02 22:41:11,528 INFO L226 Difference]: Without dead ends: 110 [2024-11-02 22:41:11,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 22:41:11,529 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 116 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:11,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1112 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 22:41:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-02 22:41:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2024-11-02 22:41:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-11-02 22:41:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-11-02 22:41:11,536 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 63 [2024-11-02 22:41:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:11,536 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-11-02 22:41:11,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 22:41:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-11-02 22:41:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-02 22:41:11,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:11,537 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:11,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-02 22:41:11,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:11,738 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:11,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1544151288, now seen corresponding path program 1 times [2024-11-02 22:41:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:11,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097035397] [2024-11-02 22:41:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:11,740 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:11,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-02 22:41:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:11,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 22:41:11,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:11,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:12,011 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097035397] [2024-11-02 22:41:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097035397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:12,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:12,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-02 22:41:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217597917] [2024-11-02 22:41:12,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:12,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 22:41:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 22:41:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-02 22:41:12,012 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 22:41:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:12,226 INFO L93 Difference]: Finished difference Result 120 states and 173 transitions. [2024-11-02 22:41:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 22:41:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2024-11-02 22:41:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:12,227 INFO L225 Difference]: With dead ends: 120 [2024-11-02 22:41:12,227 INFO L226 Difference]: Without dead ends: 106 [2024-11-02 22:41:12,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-11-02 22:41:12,228 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:12,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 679 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-02 22:41:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2024-11-02 22:41:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-11-02 22:41:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-11-02 22:41:12,235 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 65 [2024-11-02 22:41:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:12,235 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-11-02 22:41:12,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-02 22:41:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-11-02 22:41:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-02 22:41:12,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:12,236 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:12,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-02 22:41:12,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:12,436 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:12,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-11-02 22:41:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:12,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017281371] [2024-11-02 22:41:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:12,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:12,438 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:12,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-02 22:41:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:12,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 22:41:12,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:12,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 22:41:12,636 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:12,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017281371] [2024-11-02 22:41:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017281371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:12,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:12,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-02 22:41:12,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294709066] [2024-11-02 22:41:12,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:12,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 22:41:12,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:12,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 22:41:12,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-02 22:41:12,638 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:41:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:12,719 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2024-11-02 22:41:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 22:41:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-02 22:41:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:12,721 INFO L225 Difference]: With dead ends: 106 [2024-11-02 22:41:12,721 INFO L226 Difference]: Without dead ends: 92 [2024-11-02 22:41:12,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-02 22:41:12,722 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:12,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 395 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 22:41:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-02 22:41:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2024-11-02 22:41:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-02 22:41:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-11-02 22:41:12,729 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 65 [2024-11-02 22:41:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:12,729 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-11-02 22:41:12,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-02 22:41:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-11-02 22:41:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-02 22:41:12,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:12,730 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:12,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-02 22:41:12,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:12,931 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:12,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1951422266, now seen corresponding path program 1 times [2024-11-02 22:41:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:12,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785736268] [2024-11-02 22:41:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:12,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:12,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:12,933 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-02 22:41:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:12,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-02 22:41:12,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-02 22:41:13,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 22:41:14,351 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785736268] [2024-11-02 22:41:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785736268] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:41:14,351 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:41:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 17] imperfect sequences [] total 24 [2024-11-02 22:41:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175371802] [2024-11-02 22:41:14,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:41:14,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 22:41:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 22:41:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-11-02 22:41:14,354 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-02 22:41:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:14,877 INFO L93 Difference]: Finished difference Result 119 states and 172 transitions. [2024-11-02 22:41:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 22:41:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 72 [2024-11-02 22:41:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:14,878 INFO L225 Difference]: With dead ends: 119 [2024-11-02 22:41:14,878 INFO L226 Difference]: Without dead ends: 108 [2024-11-02 22:41:14,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-11-02 22:41:14,879 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 52 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:14,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 992 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:41:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-02 22:41:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-11-02 22:41:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (38), 14 states have call predecessors, (38), 13 states have call successors, (38) [2024-11-02 22:41:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 135 transitions. [2024-11-02 22:41:14,887 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 135 transitions. Word has length 72 [2024-11-02 22:41:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:14,887 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 135 transitions. [2024-11-02 22:41:14,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-02 22:41:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 135 transitions. [2024-11-02 22:41:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-02 22:41:14,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:14,888 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:14,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-02 22:41:15,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:15,089 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:15,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2024-11-02 22:41:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:15,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744561249] [2024-11-02 22:41:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:15,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:15,090 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:15,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-02 22:41:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:15,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 22:41:15,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:41:15,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 22:41:16,736 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744561249] [2024-11-02 22:41:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744561249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:16,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-02 22:41:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781678532] [2024-11-02 22:41:16,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:16,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-02 22:41:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-02 22:41:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-02 22:41:16,738 INFO L87 Difference]: Start difference. First operand 94 states and 135 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:18,950 INFO L93 Difference]: Finished difference Result 157 states and 227 transitions. [2024-11-02 22:41:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-02 22:41:18,950 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), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-02 22:41:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:18,951 INFO L225 Difference]: With dead ends: 157 [2024-11-02 22:41:18,951 INFO L226 Difference]: Without dead ends: 127 [2024-11-02 22:41:18,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-02 22:41:18,953 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 66 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:18,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 746 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 22:41:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-02 22:41:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2024-11-02 22:41:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 88 states have internal predecessors, (99), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (55), 18 states have call predecessors, (55), 17 states have call successors, (55) [2024-11-02 22:41:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 172 transitions. [2024-11-02 22:41:18,979 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 172 transitions. Word has length 72 [2024-11-02 22:41:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:18,979 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 172 transitions. [2024-11-02 22:41:18,979 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), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 172 transitions. [2024-11-02 22:41:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-02 22:41:18,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:18,980 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:18,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:19,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:19,181 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:19,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2024-11-02 22:41:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:19,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328711243] [2024-11-02 22:41:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:19,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:19,182 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:19,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-02 22:41:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:19,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 22:41:19,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:41:19,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 22:41:20,744 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:20,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328711243] [2024-11-02 22:41:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [328711243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:20,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-02 22:41:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381094431] [2024-11-02 22:41:20,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:20,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-02 22:41:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-02 22:41:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-11-02 22:41:20,746 INFO L87 Difference]: Start difference. First operand 113 states and 172 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:22,511 INFO L93 Difference]: Finished difference Result 179 states and 261 transitions. [2024-11-02 22:41:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-02 22:41:22,512 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), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-02 22:41:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:22,513 INFO L225 Difference]: With dead ends: 179 [2024-11-02 22:41:22,513 INFO L226 Difference]: Without dead ends: 162 [2024-11-02 22:41:22,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2024-11-02 22:41:22,514 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 49 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:22,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1102 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 22:41:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-02 22:41:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2024-11-02 22:41:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 112 states have internal predecessors, (127), 23 states have call successors, (23), 7 states have call predecessors, (23), 13 states have return successors, (68), 23 states have call predecessors, (68), 22 states have call successors, (68) [2024-11-02 22:41:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2024-11-02 22:41:22,533 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 72 [2024-11-02 22:41:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:22,534 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2024-11-02 22:41:22,534 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), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2024-11-02 22:41:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 22:41:22,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:22,535 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:22,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-02 22:41:22,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:22,735 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:22,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 140535092, now seen corresponding path program 1 times [2024-11-02 22:41:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679020668] [2024-11-02 22:41:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:22,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:22,737 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-02 22:41:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:22,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 22:41:22,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:22,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:22,838 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679020668] [2024-11-02 22:41:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [679020668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:22,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-02 22:41:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151422148] [2024-11-02 22:41:22,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:22,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 22:41:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 22:41:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:41:22,839 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-02 22:41:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:22,873 INFO L93 Difference]: Finished difference Result 151 states and 226 transitions. [2024-11-02 22:41:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 22:41:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2024-11-02 22:41:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:22,874 INFO L225 Difference]: With dead ends: 151 [2024-11-02 22:41:22,874 INFO L226 Difference]: Without dead ends: 146 [2024-11-02 22:41:22,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:41:22,875 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 1 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:22,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 342 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:41:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-02 22:41:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2024-11-02 22:41:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 112 states have internal predecessors, (127), 23 states have call successors, (23), 7 states have call predecessors, (23), 13 states have return successors, (68), 23 states have call predecessors, (68), 22 states have call successors, (68) [2024-11-02 22:41:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2024-11-02 22:41:22,902 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 74 [2024-11-02 22:41:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:22,902 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2024-11-02 22:41:22,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-02 22:41:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2024-11-02 22:41:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 22:41:22,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:22,904 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:22,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-02 22:41:23,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:23,104 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:23,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2024-11-02 22:41:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:23,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15781999] [2024-11-02 22:41:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:23,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:23,106 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:23,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-02 22:41:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:23,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 22:41:23,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:41:23,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 22:41:24,735 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15781999] [2024-11-02 22:41:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [15781999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:24,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-02 22:41:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092905764] [2024-11-02 22:41:24,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:24,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-02 22:41:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-02 22:41:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-02 22:41:24,737 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:25,925 INFO L93 Difference]: Finished difference Result 177 states and 256 transitions. [2024-11-02 22:41:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-02 22:41:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-02 22:41:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:25,927 INFO L225 Difference]: With dead ends: 177 [2024-11-02 22:41:25,927 INFO L226 Difference]: Without dead ends: 163 [2024-11-02 22:41:25,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 22:41:25,928 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:25,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1044 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 22:41:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-02 22:41:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2024-11-02 22:41:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 118 states have internal predecessors, (135), 24 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (63), 24 states have call predecessors, (63), 23 states have call successors, (63) [2024-11-02 22:41:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 222 transitions. [2024-11-02 22:41:25,944 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 222 transitions. Word has length 74 [2024-11-02 22:41:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:25,944 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 222 transitions. [2024-11-02 22:41:25,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 222 transitions. [2024-11-02 22:41:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 22:41:25,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:25,945 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:25,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-02 22:41:26,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:26,149 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:26,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2024-11-02 22:41:26,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:26,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757027857] [2024-11-02 22:41:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:26,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:26,151 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-02 22:41:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:26,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 22:41:26,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 22:41:26,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 22:41:27,761 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:27,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757027857] [2024-11-02 22:41:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [757027857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:27,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-02 22:41:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608671304] [2024-11-02 22:41:27,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:27,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-02 22:41:27,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-02 22:41:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-02 22:41:27,762 INFO L87 Difference]: Start difference. First operand 151 states and 222 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:29,010 INFO L93 Difference]: Finished difference Result 187 states and 263 transitions. [2024-11-02 22:41:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 22:41:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-02 22:41:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:29,012 INFO L225 Difference]: With dead ends: 187 [2024-11-02 22:41:29,012 INFO L226 Difference]: Without dead ends: 173 [2024-11-02 22:41:29,013 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 [2024-11-02 22:41:29,013 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 33 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:29,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1006 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 22:41:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-02 22:41:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 152. [2024-11-02 22:41:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 119 states have internal predecessors, (139), 23 states have call successors, (23), 9 states have call predecessors, (23), 12 states have return successors, (48), 23 states have call predecessors, (48), 22 states have call successors, (48) [2024-11-02 22:41:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2024-11-02 22:41:29,048 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 74 [2024-11-02 22:41:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:29,049 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2024-11-02 22:41:29,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-02 22:41:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2024-11-02 22:41:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-02 22:41:29,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:29,050 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:29,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-02 22:41:29,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:29,251 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:29,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1126803066, now seen corresponding path program 1 times [2024-11-02 22:41:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289725074] [2024-11-02 22:41:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:29,253 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:29,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-02 22:41:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:29,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 22:41:29,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:29,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-02 22:41:30,603 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289725074] [2024-11-02 22:41:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [289725074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:30,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-02 22:41:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191467136] [2024-11-02 22:41:30,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:30,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 22:41:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 22:41:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-02 22:41:30,604 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:31,450 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2024-11-02 22:41:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 22:41:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-11-02 22:41:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:31,452 INFO L225 Difference]: With dead ends: 176 [2024-11-02 22:41:31,452 INFO L226 Difference]: Without dead ends: 134 [2024-11-02 22:41:31,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-02 22:41:31,453 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 53 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:31,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 800 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 22:41:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-02 22:41:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2024-11-02 22:41:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 90 states have internal predecessors, (102), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (41), 18 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-02 22:41:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 161 transitions. [2024-11-02 22:41:31,469 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 161 transitions. Word has length 77 [2024-11-02 22:41:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:31,469 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 161 transitions. [2024-11-02 22:41:31,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 161 transitions. [2024-11-02 22:41:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-02 22:41:31,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:31,470 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:31,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:31,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:31,675 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:31,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1521970778, now seen corresponding path program 1 times [2024-11-02 22:41:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:31,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748768106] [2024-11-02 22:41:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:31,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:31,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:31,677 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:31,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-02 22:41:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:31,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 22:41:31,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:31,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:31,779 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:31,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748768106] [2024-11-02 22:41:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [748768106] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 22:41:31,779 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 22:41:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-11-02 22:41:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642338574] [2024-11-02 22:41:31,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 22:41:31,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 22:41:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 22:41:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:41:31,780 INFO L87 Difference]: Start difference. First operand 116 states and 161 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 22:41:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:31,805 INFO L93 Difference]: Finished difference Result 127 states and 172 transitions. [2024-11-02 22:41:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 22:41:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2024-11-02 22:41:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:31,808 INFO L225 Difference]: With dead ends: 127 [2024-11-02 22:41:31,808 INFO L226 Difference]: Without dead ends: 118 [2024-11-02 22:41:31,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 22:41:31,808 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:31,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 22:41:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-02 22:41:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-02 22:41:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 91 states have internal predecessors, (104), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (37), 19 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-02 22:41:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2024-11-02 22:41:31,821 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 76 [2024-11-02 22:41:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:31,821 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2024-11-02 22:41:31,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 22:41:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2024-11-02 22:41:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-02 22:41:31,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:31,822 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:41:31,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:32,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:32,022 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:32,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1449154486, now seen corresponding path program 2 times [2024-11-02 22:41:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346710251] [2024-11-02 22:41:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:32,024 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:32,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-02 22:41:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:32,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 22:41:32,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 22:41:32,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-02 22:41:33,319 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346710251] [2024-11-02 22:41:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [346710251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:33,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:33,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-02 22:41:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379182450] [2024-11-02 22:41:33,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:33,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 22:41:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 22:41:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-02 22:41:33,321 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:41:34,160 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2024-11-02 22:41:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 22:41:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-11-02 22:41:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:41:34,161 INFO L225 Difference]: With dead ends: 137 [2024-11-02 22:41:34,161 INFO L226 Difference]: Without dead ends: 108 [2024-11-02 22:41:34,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2024-11-02 22:41:34,162 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 26 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 22:41:34,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 845 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 22:41:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-02 22:41:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2024-11-02 22:41:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 14 states have call successors, (14), 5 states have call predecessors, (14), 9 states have return successors, (30), 15 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-02 22:41:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2024-11-02 22:41:34,172 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 77 [2024-11-02 22:41:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:41:34,173 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2024-11-02 22:41:34,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2024-11-02 22:41:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-02 22:41:34,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:41:34,174 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] [2024-11-02 22:41:34,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-02 22:41:34,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:34,374 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:41:34,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:41:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash 292726521, now seen corresponding path program 1 times [2024-11-02 22:41:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:41:34,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881588885] [2024-11-02 22:41:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:41:34,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:41:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:41:34,376 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:41:34,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-02 22:41:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:41:34,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 22:41:34,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:41:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-02 22:41:46,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:41:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-02 22:41:48,833 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:41:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881588885] [2024-11-02 22:41:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [881588885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:41:48,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:41:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-02 22:41:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862722920] [2024-11-02 22:41:48,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:41:48,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 22:41:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:41:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 22:41:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2024-11-02 22:41:48,835 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:41:50,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-02 22:42:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 22:42:14,483 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2024-11-02 22:42:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 22:42:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 81 [2024-11-02 22:42:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 22:42:14,485 INFO L225 Difference]: With dead ends: 114 [2024-11-02 22:42:14,485 INFO L226 Difference]: Without dead ends: 105 [2024-11-02 22:42:14,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=203, Invalid=1202, Unknown=1, NotChecked=0, Total=1406 [2024-11-02 22:42:14,486 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 61 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-02 22:42:14,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 898 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-02 22:42:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-02 22:42:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2024-11-02 22:42:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 77 states have internal predecessors, (85), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2024-11-02 22:42:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2024-11-02 22:42:14,501 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 81 [2024-11-02 22:42:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 22:42:14,501 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2024-11-02 22:42:14,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-02 22:42:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2024-11-02 22:42:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-02 22:42:14,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 22:42:14,504 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 22:42:14,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-02 22:42:14,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:14,704 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 22:42:14,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 22:42:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2024-11-02 22:42:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 22:42:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104691119] [2024-11-02 22:42:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 22:42:14,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 22:42:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 22:42:14,706 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 22:42:14,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-02 22:42:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 22:42:14,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-02 22:42:14,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 22:42:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-02 22:42:16,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 22:42:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-02 22:42:24,454 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 22:42:24,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104691119] [2024-11-02 22:42:24,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104691119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 22:42:24,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 22:42:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 45 [2024-11-02 22:42:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397163350] [2024-11-02 22:42:24,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 22:42:24,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-02 22:42:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 22:42:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-02 22:42:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2024-11-02 22:42:24,455 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand has 45 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 41 states have internal predecessors, (77), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13)