/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/array-patterns/array6_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 07:08:52,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 07:08:52,861 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 07:08:52,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 07:08:52,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 07:08:52,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 07:08:52,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 07:08:52,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 07:08:52,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 07:08:52,879 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 07:08:52,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 07:08:52,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 07:08:52,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 07:08:52,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 07:08:52,881 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 07:08:52,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 07:08:52,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 07:08:52,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 07:08:52,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 07:08:52,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 07:08:52,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 07:08:52,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 07:08:52,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 07:08:52,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-16 07:08:52,883 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-16 07:08:52,883 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 07:08:52,884 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-16 07:08:52,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 07:08:52,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 07:08:52,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 07:08:52,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 07:08:52,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 07:08:52,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 07:08:52,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 07:08:52,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 07:08:52,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 07:08:52,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 07:08:52,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 07:08:52,886 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-16 07:08:52,886 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-16 07:08:52,886 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 07:08:52,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 07:08:52,887 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 07:08:52,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 07:08:52,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 07:08:52,887 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-16 07:08:52,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-16 07:08:53,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 07:08:53,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 07:08:53,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 07:08:53,038 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 07:08:53,038 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 07:08:53,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array6_pattern.c [2023-12-16 07:08:54,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 07:08:54,236 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 07:08:54,237 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c [2023-12-16 07:08:54,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54242b3e2/88b799709fea4057a316de88fbc394a6/FLAGfdcf189a2 [2023-12-16 07:08:54,254 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54242b3e2/88b799709fea4057a316de88fbc394a6 [2023-12-16 07:08:54,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 07:08:54,258 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 07:08:54,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 07:08:54,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 07:08:54,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 07:08:54,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467d1c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54, skipping insertion in model container [2023-12-16 07:08:54,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,284 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 07:08:54,409 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c[1356,1369] [2023-12-16 07:08:54,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 07:08:54,434 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 07:08:54,443 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c[1356,1369] [2023-12-16 07:08:54,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 07:08:54,462 INFO L206 MainTranslator]: Completed translation [2023-12-16 07:08:54,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54 WrapperNode [2023-12-16 07:08:54,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 07:08:54,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 07:08:54,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 07:08:54,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 07:08:54,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,491 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-12-16 07:08:54,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 07:08:54,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 07:08:54,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 07:08:54,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 07:08:54,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,504 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,515 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-12-16 07:08:54,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 07:08:54,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 07:08:54,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 07:08:54,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 07:08:54,536 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (1/1) ... [2023-12-16 07:08:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 07:08:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 07:08:54,561 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 07:08:54,593 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 07:08:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-16 07:08:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-12-16 07:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 07:08:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 07:08:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 07:08:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-16 07:08:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-16 07:08:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-12-16 07:08:54,672 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 07:08:54,674 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 07:08:54,890 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 07:08:54,938 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 07:08:54,939 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 07:08:54,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 07:08:54 BoogieIcfgContainer [2023-12-16 07:08:54,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 07:08:54,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 07:08:54,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 07:08:54,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 07:08:54,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 07:08:54" (1/3) ... [2023-12-16 07:08:54,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f62fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 07:08:54, skipping insertion in model container [2023-12-16 07:08:54,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 07:08:54" (2/3) ... [2023-12-16 07:08:54,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f62fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 07:08:54, skipping insertion in model container [2023-12-16 07:08:54,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 07:08:54" (3/3) ... [2023-12-16 07:08:54,950 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2023-12-16 07:08:54,975 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 07:08:54,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 07:08:55,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 07:08:55,010 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;@18afea75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 07:08:55,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 07:08:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 07:08:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 07:08:55,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:55,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:55,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:55,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -208916493, now seen corresponding path program 1 times [2023-12-16 07:08:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383415169] [2023-12-16 07:08:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 07:08:55,029 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 07:08:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:55,039 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 07:08:55,040 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 07:08:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:08:55,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-16 07:08:55,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:55,110 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 07:08:55,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 07:08:55,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:08:55,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383415169] [2023-12-16 07:08:55,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383415169] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 07:08:55,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 07:08:55,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 07:08:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114229612] [2023-12-16 07:08:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 07:08:55,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 07:08:55,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:08:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 07:08:55,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 07:08:55,135 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 07:08:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:08:55,202 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2023-12-16 07:08:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 07:08:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 14 [2023-12-16 07:08:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:08:55,208 INFO L225 Difference]: With dead ends: 38 [2023-12-16 07:08:55,208 INFO L226 Difference]: Without dead ends: 18 [2023-12-16 07:08:55,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 07:08:55,212 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 07:08:55,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 07:08:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-16 07:08:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-16 07:08:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 07:08:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-16 07:08:55,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2023-12-16 07:08:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:08:55,235 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-16 07:08:55,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 07:08:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-16 07:08:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-16 07:08:55,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:55,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:55,238 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 07:08:55,438 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 07:08:55,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:55,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1520585160, now seen corresponding path program 1 times [2023-12-16 07:08:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:55,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675612716] [2023-12-16 07:08:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 07:08:55,440 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 07:08:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:55,451 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 07:08:55,460 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 07:08:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:08:55,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 07:08:55,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 07:08:55,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 07:08:55,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:08:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675612716] [2023-12-16 07:08:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675612716] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 07:08:55,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 07:08:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 07:08:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885822453] [2023-12-16 07:08:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 07:08:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 07:08:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:08:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 07:08:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 07:08:55,559 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 07:08:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:08:55,620 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-16 07:08:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 07:08:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 21 [2023-12-16 07:08:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:08:55,621 INFO L225 Difference]: With dead ends: 23 [2023-12-16 07:08:55,621 INFO L226 Difference]: Without dead ends: 19 [2023-12-16 07:08:55,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 07:08:55,623 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 07:08:55,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 07:08:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-16 07:08:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-16 07:08:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 07:08:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-12-16 07:08:55,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 21 [2023-12-16 07:08:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:08:55,628 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-12-16 07:08:55,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 07:08:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-12-16 07:08:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-16 07:08:55,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:55,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:55,633 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 (3)] Forceful destruction successful, exit code 0 [2023-12-16 07:08:55,831 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 07:08:55,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:55,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 133041195, now seen corresponding path program 1 times [2023-12-16 07:08:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295091160] [2023-12-16 07:08:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 07:08:55,833 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 07:08:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:55,834 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 07:08:55,835 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 07:08:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:08:55,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 07:08:55,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 07:08:56,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 07:08:56,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:08:56,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295091160] [2023-12-16 07:08:56,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295091160] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 07:08:56,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 07:08:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-16 07:08:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337013196] [2023-12-16 07:08:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 07:08:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 07:08:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:08:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 07:08:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-16 07:08:56,059 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:08:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:08:56,283 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-12-16 07:08:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 07:08:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-16 07:08:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:08:56,285 INFO L225 Difference]: With dead ends: 39 [2023-12-16 07:08:56,285 INFO L226 Difference]: Without dead ends: 24 [2023-12-16 07:08:56,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-12-16 07:08:56,286 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 07:08:56,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 07:08:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-16 07:08:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-16 07:08:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:08:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-12-16 07:08:56,292 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2023-12-16 07:08:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:08:56,293 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-12-16 07:08:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:08:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-12-16 07:08:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-16 07:08:56,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:56,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:56,302 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 (4)] Forceful destruction successful, exit code 0 [2023-12-16 07:08:56,498 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 [2023-12-16 07:08:56,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:56,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1617342797, now seen corresponding path program 1 times [2023-12-16 07:08:56,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:56,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262381466] [2023-12-16 07:08:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 07:08:56,503 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 07:08:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:56,505 INFO L229 MonitoredProcess]: Starting monitored process 5 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 07:08:56,518 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 (5)] Waiting until timeout for monitored process [2023-12-16 07:08:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:08:56,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 07:08:56,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 07:08:56,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:08:57,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:08:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262381466] [2023-12-16 07:08:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262381466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 07:08:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454120611] [2023-12-16 07:08:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 07:08:57,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 07:08:57,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 07:08:57,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 07:08:57,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-16 07:08:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:08:57,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-16 07:08:57,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 07:08:57,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:08:57,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454120611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 07:08:57,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 07:08:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2023-12-16 07:08:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476644373] [2023-12-16 07:08:57,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 07:08:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 07:08:57,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:08:57,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 07:08:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-12-16 07:08:57,435 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 07:08:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:08:57,848 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-12-16 07:08:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 07:08:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-16 07:08:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:08:57,849 INFO L225 Difference]: With dead ends: 51 [2023-12-16 07:08:57,849 INFO L226 Difference]: Without dead ends: 30 [2023-12-16 07:08:57,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-12-16 07:08:57,850 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 07:08:57,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 07:08:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-16 07:08:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-12-16 07:08:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:08:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-12-16 07:08:57,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2023-12-16 07:08:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:08:57,855 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-12-16 07:08:57,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 07:08:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-12-16 07:08:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-16 07:08:57,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:57,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:57,862 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 (5)] Forceful destruction successful, exit code 0 [2023-12-16 07:08:58,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-16 07:08:58,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /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/cvc4 --incremental --print-success --lang smt [2023-12-16 07:08:58,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:58,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash 386052203, now seen corresponding path program 2 times [2023-12-16 07:08:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:58,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254296818] [2023-12-16 07:08:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 07:08:58,263 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 07:08:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:58,265 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 07:08:58,275 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 07:08:58,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 07:08:58,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:08:58,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 07:08:58,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 07:08:58,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:08:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 07:08:58,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:08:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254296818] [2023-12-16 07:08:58,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254296818] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 07:08:58,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 07:08:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2023-12-16 07:08:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662793903] [2023-12-16 07:08:58,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 07:08:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 07:08:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:08:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 07:08:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-12-16 07:08:58,765 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 07:08:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:08:59,088 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-12-16 07:08:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 07:08:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2023-12-16 07:08:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:08:59,090 INFO L225 Difference]: With dead ends: 30 [2023-12-16 07:08:59,090 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 07:08:59,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-12-16 07:08:59,091 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 07:08:59,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 71 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 07:08:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 07:08:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 07:08:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:08:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-16 07:08:59,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-12-16 07:08:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:08:59,096 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-16 07:08:59,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 07:08:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-16 07:08:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 07:08:59,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:08:59,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:08:59,109 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 (7)] Forceful destruction successful, exit code 0 [2023-12-16 07:08:59,299 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 [2023-12-16 07:08:59,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:08:59,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:08:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -890742696, now seen corresponding path program 3 times [2023-12-16 07:08:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:08:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276882508] [2023-12-16 07:08:59,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 07:08:59,301 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 07:08:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:08:59,302 INFO L229 MonitoredProcess]: Starting monitored process 8 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 07:08:59,322 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 (8)] Waiting until timeout for monitored process [2023-12-16 07:08:59,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 07:08:59,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:08:59,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 07:08:59,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:08:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 07:08:59,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 07:09:00,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:09:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276882508] [2023-12-16 07:09:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276882508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 07:09:00,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 07:09:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2023-12-16 07:09:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52128339] [2023-12-16 07:09:00,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 07:09:00,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 07:09:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:09:00,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 07:09:00,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-16 07:09:00,264 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 07:09:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:09:01,190 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-12-16 07:09:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-16 07:09:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-12-16 07:09:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:09:01,194 INFO L225 Difference]: With dead ends: 37 [2023-12-16 07:09:01,194 INFO L226 Difference]: Without dead ends: 33 [2023-12-16 07:09:01,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2023-12-16 07:09:01,195 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 07:09:01,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 07:09:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-16 07:09:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-12-16 07:09:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:09:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-12-16 07:09:01,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-12-16 07:09:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:09:01,201 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-12-16 07:09:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 07:09:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-12-16 07:09:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 07:09:01,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:09:01,202 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:09:01,220 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 (8)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:01,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /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 07:09:01,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:09:01,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:09:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1816678901, now seen corresponding path program 4 times [2023-12-16 07:09:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:09:01,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005823060] [2023-12-16 07:09:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 07:09:01,406 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 07:09:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:09:01,422 INFO L229 MonitoredProcess]: Starting monitored process 9 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 07:09:01,439 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 (9)] Waiting until timeout for monitored process [2023-12-16 07:09:01,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 07:09:01,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:09:01,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 07:09:01,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 07:09:01,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:01,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:09:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005823060] [2023-12-16 07:09:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005823060] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 07:09:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501736547] [2023-12-16 07:09:01,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 07:09:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 07:09:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 07:09:01,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 07:09:01,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-16 07:09:02,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 07:09:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:09:02,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-16 07:09:02,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 07:09:02,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 07:09:02,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501736547] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 07:09:02,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 07:09:02,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2023-12-16 07:09:02,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303336941] [2023-12-16 07:09:02,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 07:09:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-16 07:09:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:09:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-16 07:09:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2023-12-16 07:09:02,786 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-16 07:09:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:09:03,626 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-12-16 07:09:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 07:09:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-12-16 07:09:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:09:03,627 INFO L225 Difference]: With dead ends: 51 [2023-12-16 07:09:03,627 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 07:09:03,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2023-12-16 07:09:03,628 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-16 07:09:03,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 129 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-16 07:09:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 07:09:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-16 07:09:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 07:09:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-12-16 07:09:03,637 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2023-12-16 07:09:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:09:03,637 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-12-16 07:09:03,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-16 07:09:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-12-16 07:09:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-16 07:09:03,640 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:09:03,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:09:03,660 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 (9)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:03,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-16 07:09:04,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:09:04,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:09:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash 120910381, now seen corresponding path program 5 times [2023-12-16 07:09:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:09:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187803064] [2023-12-16 07:09:04,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 07:09:04,042 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 07:09:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:09:04,043 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 07:09:04,046 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 07:09:04,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-16 07:09:04,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:09:04,383 WARN L260 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-16 07:09:04,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:04,559 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 07:09:04,570 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 07:09:04,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2023-12-16 07:09:04,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-16 07:09:04,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:04,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-16 07:09:04,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 07:09:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,452 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:05,463 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-12-16 07:09:05,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 77 [2023-12-16 07:09:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:05,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:05,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:05,515 INFO L349 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2023-12-16 07:09:05,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 85 treesize of output 111 [2023-12-16 07:09:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,619 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,649 INFO L349 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2023-12-16 07:09:06,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 46 [2023-12-16 07:09:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:06,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:06,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 38 [2023-12-16 07:09:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 07:09:06,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:10,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:09:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187803064] [2023-12-16 07:09:10,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187803064] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 07:09:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286177385] [2023-12-16 07:09:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 07:09:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 07:09:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 07:09:10,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 07:09:10,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-16 07:09:10,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 07:09:10,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488615441] [2023-12-16 07:09:10,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 07:09:10,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 07:09:10,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 07:09:10,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 07:09:10,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 1 [2023-12-16 07:09:10,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 07:09:11,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-16 07:09:11,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:09:11,064 WARN L260 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-16 07:09:11,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:11,167 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 07:09:11,182 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 07:09:11,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-16 07:09:11,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2023-12-16 07:09:11,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:11,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-16 07:09:11,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 07:09:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:13,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:13,435 INFO L349 Elim1Store]: treesize reduction 218, result has 19.0 percent of original size [2023-12-16 07:09:13,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 85 treesize of output 127 [2023-12-16 07:09:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:13,528 INFO L349 Elim1Store]: treesize reduction 139, result has 15.8 percent of original size [2023-12-16 07:09:13,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 63 treesize of output 88 [2023-12-16 07:09:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:15,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:15,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:15,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:15,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 40 [2023-12-16 07:09:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-16 07:09:16,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:16,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 38 [2023-12-16 07:09:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 07:09:16,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:22,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488615441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 07:09:22,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 07:09:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 32 [2023-12-16 07:09:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664370419] [2023-12-16 07:09:22,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 07:09:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-16 07:09:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:09:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-16 07:09:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1869, Unknown=0, NotChecked=0, Total=2162 [2023-12-16 07:09:22,613 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 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 07:09:30,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 07:09:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:09:30,091 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-12-16 07:09:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-16 07:09:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 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 27 [2023-12-16 07:09:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:09:30,093 INFO L225 Difference]: With dead ends: 57 [2023-12-16 07:09:30,093 INFO L226 Difference]: Without dead ends: 45 [2023-12-16 07:09:30,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=428, Invalid=2652, Unknown=0, NotChecked=0, Total=3080 [2023-12-16 07:09:30,098 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-16 07:09:30,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 207 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-16 07:09:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-16 07:09:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-12-16 07:09:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 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 07:09:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-12-16 07:09:30,115 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2023-12-16 07:09:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:09:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-12-16 07:09:30,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 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 07:09:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-12-16 07:09:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-16 07:09:30,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:09:30,116 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:09:30,122 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 (11)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:30,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:30,533 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=3,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 07:09:30,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:09:30,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:09:30,534 INFO L85 PathProgramCache]: Analyzing trace with hash 56635979, now seen corresponding path program 6 times [2023-12-16 07:09:30,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:09:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962002763] [2023-12-16 07:09:30,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 07:09:30,535 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 07:09:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:09:30,537 INFO L229 MonitoredProcess]: Starting monitored process 14 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 07:09:30,540 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 (14)] Waiting until timeout for monitored process [2023-12-16 07:09:30,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-16 07:09:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 07:09:30,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-16 07:09:30,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 07:09:31,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 07:09:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 07:09:31,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 07:09:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962002763] [2023-12-16 07:09:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962002763] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 07:09:31,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 07:09:31,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2023-12-16 07:09:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889577946] [2023-12-16 07:09:31,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 07:09:31,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-16 07:09:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 07:09:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-16 07:09:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-12-16 07:09:31,592 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 07:09:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 07:09:32,826 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-16 07:09:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 07:09:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2023-12-16 07:09:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 07:09:32,828 INFO L225 Difference]: With dead ends: 59 [2023-12-16 07:09:32,828 INFO L226 Difference]: Without dead ends: 55 [2023-12-16 07:09:32,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2023-12-16 07:09:32,829 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 07:09:32,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 238 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 07:09:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-16 07:09:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2023-12-16 07:09:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 07:09:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-16 07:09:32,840 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2023-12-16 07:09:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 07:09:32,840 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-16 07:09:32,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 07:09:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-16 07:09:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 07:09:32,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 07:09:32,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 07:09:32,849 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 (14)] Forceful destruction successful, exit code 0 [2023-12-16 07:09:33,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /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 07:09:33,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 07:09:33,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 07:09:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1782256248, now seen corresponding path program 7 times [2023-12-16 07:09:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 07:09:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828709260] [2023-12-16 07:09:33,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 07:09:33,043 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 07:09:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 07:09:33,044 INFO L229 MonitoredProcess]: Starting monitored process 15 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 07:09:33,045 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 (15)] Waiting until timeout for monitored process [2023-12-16 07:09:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 07:09:33,499 WARN L260 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-16 07:09:33,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 07:09:33,619 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 07:09:33,628 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 07:09:33,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 07:09:33,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2023-12-16 07:09:33,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:33,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-16 07:09:33,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:33,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-16 07:09:33,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:33,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 07:09:33,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 07:09:33,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 44 [2023-12-16 07:09:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,085 INFO L349 Elim1Store]: treesize reduction 232, result has 16.2 percent of original size [2023-12-16 07:09:35,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 103 treesize of output 145 [2023-12-16 07:09:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 07:09:35,231 INFO L349 Elim1Store]: treesize reduction 229, result has 17.3 percent of original size [2023-12-16 07:09:35,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 91 treesize of output 136 [2023-12-16 07:09:39,767 INFO L349 Elim1Store]: treesize reduction 157, result has 61.4 percent of original size [2023-12-16 07:09:39,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 252 treesize of output 419 [2023-12-16 07:09:40,583 INFO L349 Elim1Store]: treesize reduction 174, result has 57.2 percent of original size [2023-12-16 07:09:40,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 176 treesize of output 338 Received shutdown request... [2023-12-16 07:10:07,723 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 07:10:07,724 WARN L340 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 (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 07:10:07,746 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 07:10:07,757 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 (15)] Forceful destruction successful, exit code 0 [2023-12-16 07:10:07,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /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 07:10:07,948 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 30 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-36-2-1 context. [2023-12-16 07:10:07,952 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2023-12-16 07:10:07,953 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 07:10:07,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 07:10:07 BoogieIcfgContainer [2023-12-16 07:10:07,955 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 07:10:07,955 INFO L158 Benchmark]: Toolchain (without parser) took 73696.86ms. Allocated memory was 302.0MB in the beginning and 362.8MB in the end (delta: 60.8MB). Free memory was 249.8MB in the beginning and 151.5MB in the end (delta: 98.3MB). Peak memory consumption was 204.0MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,955 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 228.6MB. Free memory was 178.0MB in the beginning and 177.9MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 07:10:07,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.14ms. Allocated memory is still 302.0MB. Free memory was 249.6MB in the beginning and 237.7MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,956 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.63ms. Allocated memory is still 302.0MB. Free memory was 237.5MB in the beginning and 235.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,956 INFO L158 Benchmark]: Boogie Preprocessor took 42.98ms. Allocated memory is still 302.0MB. Free memory was 235.9MB in the beginning and 233.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,956 INFO L158 Benchmark]: RCFGBuilder took 403.98ms. Allocated memory is still 302.0MB. Free memory was 233.6MB in the beginning and 218.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,956 INFO L158 Benchmark]: TraceAbstraction took 73014.12ms. Allocated memory was 302.0MB in the beginning and 362.8MB in the end (delta: 60.8MB). Free memory was 217.9MB in the beginning and 151.5MB in the end (delta: 66.4MB). Peak memory consumption was 171.5MB. Max. memory is 8.0GB. [2023-12-16 07:10:07,957 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 228.6MB. Free memory was 178.0MB in the beginning and 177.9MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.14ms. Allocated memory is still 302.0MB. Free memory was 249.6MB in the beginning and 237.7MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.63ms. Allocated memory is still 302.0MB. Free memory was 237.5MB in the beginning and 235.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.98ms. Allocated memory is still 302.0MB. Free memory was 235.9MB in the beginning and 233.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 403.98ms. Allocated memory is still 302.0MB. Free memory was 233.6MB in the beginning and 218.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 73014.12ms. Allocated memory was 302.0MB in the beginning and 362.8MB in the end (delta: 60.8MB). Free memory was 217.9MB in the beginning and 151.5MB in the end (delta: 66.4MB). Peak memory consumption was 171.5MB. 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 - TimeoutResultAtElement [Line: 33]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 33). Cancelled while NwaCegarLoop was analyzing trace of length 30 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-36-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.0s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 330 mSDsluCounter, 901 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 753 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1322 IncrementalHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 148 mSDtfsCounter, 1322 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 281 SyntacticMatches, 7 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 18.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=9, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 27 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 286 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 373 ConstructedInterpolants, 181 QuantifiedInterpolants, 4901 SizeOfPredicates, 58 NumberOfNonLiveVariables, 901 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 84/168 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 could not prove your program: Timeout Completed graceful shutdown