/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 17:48:25,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 17:48:25,728 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-16 17:48:25,734 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 17:48:25,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 17:48:25,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 17:48:25,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 17:48:25,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 17:48:25,757 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 17:48:25,760 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 17:48:25,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 17:48:25,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 17:48:25,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 17:48:25,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 17:48:25,762 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 17:48:25,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 17:48:25,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 17:48:25,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 17:48:25,764 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 17:48:25,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 17:48:25,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 17:48:25,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 17:48:25,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 17:48:25,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 17:48:25,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 17:48:25,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 17:48:25,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 17:48:25,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 17:48:25,767 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-16 17:48:25,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-16 17:48:25,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 17:48:25,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 17:48:25,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 17:48:25,961 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 17:48:25,962 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 17:48:25,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c [2023-12-16 17:48:27,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 17:48:27,144 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 17:48:27,145 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c [2023-12-16 17:48:27,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89df3d561/4b5a0d4bc72147d1a23b11aa555bf247/FLAG70a5389f4 [2023-12-16 17:48:27,161 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89df3d561/4b5a0d4bc72147d1a23b11aa555bf247 [2023-12-16 17:48:27,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 17:48:27,164 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 17:48:27,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 17:48:27,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 17:48:27,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 17:48:27,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799aecff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27, skipping insertion in model container [2023-12-16 17:48:27,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,185 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 17:48:27,286 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2023-12-16 17:48:27,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 17:48:27,303 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 17:48:27,311 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2023-12-16 17:48:27,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 17:48:27,324 INFO L206 MainTranslator]: Completed translation [2023-12-16 17:48:27,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27 WrapperNode [2023-12-16 17:48:27,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 17:48:27,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 17:48:27,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 17:48:27,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 17:48:27,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,347 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-12-16 17:48:27,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 17:48:27,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 17:48:27,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 17:48:27,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 17:48:27,354 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,363 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 2 writes are split as follows [0, 2]. [2023-12-16 17:48:27,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,374 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 17:48:27,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 17:48:27,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 17:48:27,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 17:48:27,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (1/1) ... [2023-12-16 17:48:27,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 17:48:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 17:48:27,398 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) [2023-12-16 17:48:27,405 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 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-16 17:48:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2023-12-16 17:48:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2023-12-16 17:48:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 17:48:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 17:48:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 17:48:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-16 17:48:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-16 17:48:27,497 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 17:48:27,499 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 17:48:27,620 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 17:48:27,646 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 17:48:27,647 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-16 17:48:27,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:27 BoogieIcfgContainer [2023-12-16 17:48:27,647 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 17:48:27,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 17:48:27,649 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 17:48:27,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 17:48:27,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:48:27" (1/3) ... [2023-12-16 17:48:27,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e15fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:27, skipping insertion in model container [2023-12-16 17:48:27,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:27" (2/3) ... [2023-12-16 17:48:27,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e15fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:27, skipping insertion in model container [2023-12-16 17:48:27,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:27" (3/3) ... [2023-12-16 17:48:27,655 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_1b.c [2023-12-16 17:48:27,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 17:48:27,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 17:48:27,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 17:48:27,709 INFO L357 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, mHoare=true, 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;@403ef9fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 17:48:27,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 17:48:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 17:48:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-16 17:48:27,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:27,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:27,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:27,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1146450700, now seen corresponding path program 1 times [2023-12-16 17:48:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:27,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839750966] [2023-12-16 17:48:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 17:48:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:27,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:27,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-16 17:48:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 17:48:27,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-16 17:48:27,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:27,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 17:48:27,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 17:48:27,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:27,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839750966] [2023-12-16 17:48:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839750966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 17:48:27,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 17:48:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 17:48:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943013641] [2023-12-16 17:48:27,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 17:48:27,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 17:48:27,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 17:48:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 17:48:27,998 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 17:48:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:28,047 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-12-16 17:48:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 17:48:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-16 17:48:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:28,055 INFO L225 Difference]: With dead ends: 21 [2023-12-16 17:48:28,055 INFO L226 Difference]: Without dead ends: 13 [2023-12-16 17:48:28,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 17:48:28,059 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:28,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 17:48:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-16 17:48:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-16 17:48:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 17:48:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-12-16 17:48:28,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-12-16 17:48:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:28,083 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-12-16 17:48:28,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 17:48:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-12-16 17:48:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 17:48:28,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:28,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:28,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-12-16 17:48:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:28,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:28,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1151650808, now seen corresponding path program 1 times [2023-12-16 17:48:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:28,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825621803] [2023-12-16 17:48:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 17:48:28,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:28,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:28,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-16 17:48:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 17:48:28,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 17:48:28,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:28,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 17:48:28,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 17:48:28,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825621803] [2023-12-16 17:48:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825621803] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 17:48:28,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 17:48:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-12-16 17:48:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992762873] [2023-12-16 17:48:28,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 17:48:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 17:48:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 17:48:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-12-16 17:48:28,991 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 17:48:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:29,154 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-12-16 17:48:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 17:48:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 14 [2023-12-16 17:48:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:29,156 INFO L225 Difference]: With dead ends: 19 [2023-12-16 17:48:29,156 INFO L226 Difference]: Without dead ends: 15 [2023-12-16 17:48:29,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-12-16 17:48:29,158 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:29,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 17:48:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-16 17:48:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-16 17:48:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 17:48:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-12-16 17:48:29,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2023-12-16 17:48:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:29,161 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-12-16 17:48:29,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 17:48:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-12-16 17:48:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-16 17:48:29,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:29,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:29,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-16 17:48:29,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:29,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:29,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 8320110, now seen corresponding path program 2 times [2023-12-16 17:48:29,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:29,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807757941] [2023-12-16 17:48:29,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 17:48:29,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:29,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:29,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-16 17:48:29,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 17:48:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:29,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-16 17:48:29,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:29,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:29,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 17:48:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 17:48:29,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:29,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-16 17:48:29,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807757941] [2023-12-16 17:48:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807757941] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 17:48:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674538519] [2023-12-16 17:48:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 17:48:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 17:48:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 17:48:30,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 17:48:30,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-12-16 17:48:30,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 17:48:30,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318216181] [2023-12-16 17:48:30,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 17:48:30,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 17:48:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 17:48:30,142 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) [2023-12-16 17:48:30,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 1 [2023-12-16 17:48:30,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 17:48:30,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 17:48:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:30,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-16 17:48:30,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:30,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:30,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 17:48:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 17:48:30,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:30,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-16 17:48:34,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318216181] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 17:48:34,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 17:48:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2023-12-16 17:48:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931848446] [2023-12-16 17:48:34,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 17:48:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-16 17:48:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-16 17:48:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-16 17:48:34,625 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 17:48:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:34,767 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-16 17:48:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 17:48:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-12-16 17:48:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:34,768 INFO L225 Difference]: With dead ends: 21 [2023-12-16 17:48:34,768 INFO L226 Difference]: Without dead ends: 17 [2023-12-16 17:48:34,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-12-16 17:48:34,769 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:34,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 17:48:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-16 17:48:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-16 17:48:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 17:48:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-16 17:48:34,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 19 [2023-12-16 17:48:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:34,773 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-16 17:48:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 17:48:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-16 17:48:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-16 17:48:34,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:34,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:34,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-16 17:48:34,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-16 17:48:35,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 17:48:35,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:35,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1489619010, now seen corresponding path program 3 times [2023-12-16 17:48:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060753739] [2023-12-16 17:48:35,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 17:48:35,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:35,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:35,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-16 17:48:35,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 17:48:35,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:35,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-16 17:48:35,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:35,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:35,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 17:48:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 17:48:35,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:35,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-16 17:48:40,131 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_19_to_19_0_#in~a.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_func_to_recursive_line_19_to_19_0_#in~a.base_BEFORE_CALL_12| (_ BitVec 32))) (or (not (= (_ bv6 32) (select (select (store |c_#memory_int#1| c_func_to_recursive_line_19_to_19_0_~a.base (let ((.cse0 (select |c_#memory_int#1| c_func_to_recursive_line_19_to_19_0_~a.base))) (store .cse0 c_func_to_recursive_line_19_to_19_0_~a.offset (bvadd (select .cse0 c_func_to_recursive_line_19_to_19_0_~a.offset) (_ bv1 32))))) |v_func_to_recursive_line_19_to_19_0_#in~a.base_BEFORE_CALL_12|) |v_func_to_recursive_line_19_to_19_0_#in~a.offset_BEFORE_CALL_12|))) (= (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_19_to_19_0_#in~a.base| (let ((.cse1 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_19_to_19_0_#in~a.base|))) (store .cse1 |c_func_to_recursive_line_19_to_19_0_#in~a.offset| (bvadd (select .cse1 |c_func_to_recursive_line_19_to_19_0_#in~a.offset|) (_ bv2 32))))) |v_func_to_recursive_line_19_to_19_0_#in~a.base_BEFORE_CALL_12|) |v_func_to_recursive_line_19_to_19_0_#in~a.offset_BEFORE_CALL_12|) (_ bv6 32)))) is different from false [2023-12-16 17:48:40,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060753739] [2023-12-16 17:48:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060753739] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 17:48:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135374970] [2023-12-16 17:48:40,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 17:48:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 17:48:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 17:48:40,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 17:48:40,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-16 17:48:40,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 17:48:40,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370374626] [2023-12-16 17:48:40,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 17:48:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 17:48:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 17:48:40,210 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) [2023-12-16 17:48:40,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 1 [2023-12-16 17:48:40,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 17:48:40,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 17:48:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:40,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-16 17:48:40,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:40,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:40,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 17:48:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 17:48:40,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:40,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-16 17:48:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370374626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 17:48:40,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 17:48:40,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2023-12-16 17:48:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600158434] [2023-12-16 17:48:40,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 17:48:40,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 17:48:40,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 17:48:40,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=263, Unknown=1, NotChecked=32, Total=342 [2023-12-16 17:48:40,991 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-16 17:48:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:41,133 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-12-16 17:48:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 17:48:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2023-12-16 17:48:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:41,134 INFO L225 Difference]: With dead ends: 23 [2023-12-16 17:48:41,134 INFO L226 Difference]: Without dead ends: 19 [2023-12-16 17:48:41,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2023-12-16 17:48:41,135 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:41,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 17:48:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-16 17:48:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-16 17:48:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-16 17:48:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-12-16 17:48:41,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 24 [2023-12-16 17:48:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:41,138 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-12-16 17:48:41,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-16 17:48:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-12-16 17:48:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 17:48:41,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:41,139 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:41,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-16 17:48:41,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-16 17:48:41,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 17:48:41,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:41,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 85411560, now seen corresponding path program 4 times [2023-12-16 17:48:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:41,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859992762] [2023-12-16 17:48:41,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 17:48:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:41,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:41,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-16 17:48:41,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 17:48:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:41,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-16 17:48:41,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:41,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-16 17:48:41,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 17:48:43,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859992762] [2023-12-16 17:48:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859992762] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 17:48:43,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 17:48:43,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 31 [2023-12-16 17:48:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791522143] [2023-12-16 17:48:43,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 17:48:43,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-16 17:48:43,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-16 17:48:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-12-16 17:48:43,813 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-16 17:48:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:44,356 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-12-16 17:48:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-16 17:48:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 29 [2023-12-16 17:48:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:44,357 INFO L225 Difference]: With dead ends: 25 [2023-12-16 17:48:44,357 INFO L226 Difference]: Without dead ends: 21 [2023-12-16 17:48:44,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2023-12-16 17:48:44,358 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:44,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 154 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 17:48:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-16 17:48:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-16 17:48:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-16 17:48:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-12-16 17:48:44,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 29 [2023-12-16 17:48:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:44,362 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-12-16 17:48:44,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-16 17:48:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-12-16 17:48:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-16 17:48:44,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:44,363 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:44,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-16 17:48:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:44,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1362462852, now seen corresponding path program 5 times [2023-12-16 17:48:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632179626] [2023-12-16 17:48:44,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 17:48:44,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:44,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:44,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:44,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-16 17:48:44,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-16 17:48:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 17:48:44,639 WARN L260 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-16 17:48:44,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 17:48:44,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 17:48:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-16 17:48:45,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 17:48:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 17:48:47,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 17:48:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632179626] [2023-12-16 17:48:47,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632179626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 17:48:47,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 17:48:47,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25] total 36 [2023-12-16 17:48:47,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649439020] [2023-12-16 17:48:47,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 17:48:47,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-16 17:48:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 17:48:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-16 17:48:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2023-12-16 17:48:47,710 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 8 states have call successors, (8), 7 states have call predecessors, (8), 12 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 17:48:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 17:48:48,443 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-16 17:48:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 17:48:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 8 states have call successors, (8), 7 states have call predecessors, (8), 12 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) Word has length 34 [2023-12-16 17:48:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 17:48:48,444 INFO L225 Difference]: With dead ends: 27 [2023-12-16 17:48:48,444 INFO L226 Difference]: Without dead ends: 23 [2023-12-16 17:48:48,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2023-12-16 17:48:48,446 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 17:48:48,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 154 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 17:48:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-16 17:48:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-16 17:48:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-16 17:48:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-16 17:48:48,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 34 [2023-12-16 17:48:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 17:48:48,449 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-16 17:48:48,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 8 states have call successors, (8), 7 states have call predecessors, (8), 12 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 17:48:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-16 17:48:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-16 17:48:48,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 17:48:48,450 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 17:48:48,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-16 17:48:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:48,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 17:48:48,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 17:48:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2002779038, now seen corresponding path program 6 times [2023-12-16 17:48:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 17:48:48,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110209011] [2023-12-16 17:48:48,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 17:48:48,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 17:48:48,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 17:48:48,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-16 17:48:48,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-16 17:48:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-16 17:48:48,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-16 17:48:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-16 17:48:48,807 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-12-16 17:48:48,807 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-16 17:48:48,808 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 17:48:48,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-12-16 17:48:49,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 17:48:49,012 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1] [2023-12-16 17:48:49,014 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 17:48:49,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:48:49 BoogieIcfgContainer [2023-12-16 17:48:49,029 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 17:48:49,030 INFO L158 Benchmark]: Toolchain (without parser) took 21865.47ms. Allocated memory was 185.6MB in the beginning and 269.5MB in the end (delta: 83.9MB). Free memory was 134.1MB in the beginning and 131.3MB in the end (delta: 2.8MB). Peak memory consumption was 87.7MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,030 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 185.6MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 17:48:49,030 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.40ms. Allocated memory is still 185.6MB. Free memory was 133.6MB in the beginning and 123.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.00ms. Allocated memory is still 185.6MB. Free memory was 123.1MB in the beginning and 121.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,030 INFO L158 Benchmark]: Boogie Preprocessor took 27.71ms. Allocated memory is still 185.6MB. Free memory was 121.5MB in the beginning and 120.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,031 INFO L158 Benchmark]: RCFGBuilder took 271.31ms. Allocated memory is still 185.6MB. Free memory was 119.8MB in the beginning and 107.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,031 INFO L158 Benchmark]: TraceAbstraction took 21380.74ms. Allocated memory was 185.6MB in the beginning and 269.5MB in the end (delta: 83.9MB). Free memory was 107.4MB in the beginning and 131.3MB in the end (delta: -23.8MB). Peak memory consumption was 61.5MB. Max. memory is 8.0GB. [2023-12-16 17:48:49,032 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 185.6MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 158.40ms. Allocated memory is still 185.6MB. Free memory was 133.6MB in the beginning and 123.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.00ms. Allocated memory is still 185.6MB. Free memory was 123.1MB in the beginning and 121.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.71ms. Allocated memory is still 185.6MB. Free memory was 121.5MB in the beginning and 120.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.31ms. Allocated memory is still 185.6MB. Free memory was 119.8MB in the beginning and 107.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 21380.74ms. Allocated memory was 185.6MB in the beginning and 269.5MB in the end (delta: 83.9MB). Free memory was 107.4MB in the beginning and 131.3MB in the end (delta: -23.8MB). Peak memory consumption was 61.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 48]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] int a = 6; [L41] int a = 6; [L43] a = 0 [L44] CALL func_to_recursive_line_19_to_19_0(&a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}] [L25] EXPR \read(*a) VAL [a={5:0}, a={5:0}] [L25] COND FALSE !((*a) < 6) [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [a={5:0}, a={5:0}] [L44] RET func_to_recursive_line_19_to_19_0(&a) VAL [a={5:0}] [L46] EXPR \read(a) [L46] COND TRUE a == 6 [L48] reach_error() VAL [a={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.3s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 54 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 487 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 431 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 690 IncrementalHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 56 mSDtfsCounter, 690 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 294 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 211 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 238 ConstructedInterpolants, 0 QuantifiedInterpolants, 2857 SizeOfPredicates, 72 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 88/320 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-16 17:48:49,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...