/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-examples/relax-2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 15:27:24,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 15:27:24,925 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-21 15:27:24,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 15:27:24,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 15:27:24,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 15:27:24,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 15:27:24,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 15:27:24,942 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 15:27:24,942 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 15:27:24,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 15:27:24,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 15:27:24,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 15:27:24,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 15:27:24,943 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 15:27:24,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 15:27:24,944 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 15:27:24,944 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 15:27:24,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 15:27:24,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 15:27:24,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 15:27:24,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 15:27:24,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 15:27:24,948 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 15:27:24,949 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 15:27:24,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 15:27:24,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 15:27:24,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 15:27:24,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 15:27:24,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 15:27:24,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 15:27:24,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 15:27:24,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 15:27:24,951 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-21 15:27:24,951 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-21 15:27:24,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 15:27:24,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 15:27:24,952 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 15:27:24,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 15:27:24,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 15:27:24,952 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-21 15:27:24,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-21 15:27:25,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 15:27:25,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 15:27:25,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 15:27:25,148 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 15:27:25,148 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 15:27:25,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2-2.i [2023-12-21 15:27:26,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 15:27:26,341 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 15:27:26,341 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2-2.i [2023-12-21 15:27:26,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c417bfb23/b122f6e181b54383940edc9fffe69a69/FLAGecff1add4 [2023-12-21 15:27:26,361 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c417bfb23/b122f6e181b54383940edc9fffe69a69 [2023-12-21 15:27:26,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 15:27:26,364 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 15:27:26,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 15:27:26,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 15:27:26,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 15:27:26,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3498814a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26, skipping insertion in model container [2023-12-21 15:27:26,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 15:27:26,528 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-examples/relax-2-2.i[982,995] [2023-12-21 15:27:26,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 15:27:26,670 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 15:27:26,680 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-examples/relax-2-2.i[982,995] [2023-12-21 15:27:26,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 15:27:26,726 INFO L206 MainTranslator]: Completed translation [2023-12-21 15:27:26,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26 WrapperNode [2023-12-21 15:27:26,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 15:27:26,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 15:27:26,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 15:27:26,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 15:27:26,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,792 INFO L138 Inliner]: procedures = 123, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2023-12-21 15:27:26,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 15:27:26,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 15:27:26,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 15:27:26,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 15:27:26,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,804 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,814 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-12-21 15:27:26,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,828 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 15:27:26,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 15:27:26,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 15:27:26,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 15:27:26,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (1/1) ... [2023-12-21 15:27:26,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 15:27:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 15:27:26,897 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) [2023-12-21 15:27:26,899 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 [2023-12-21 15:27:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 15:27:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 15:27:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-21 15:27:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-12-21 15:27:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-21 15:27:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-21 15:27:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-21 15:27:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 15:27:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 15:27:27,034 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 15:27:27,036 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 15:27:27,248 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 15:27:27,280 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 15:27:27,280 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-21 15:27:27,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:27 BoogieIcfgContainer [2023-12-21 15:27:27,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 15:27:27,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 15:27:27,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 15:27:27,285 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 15:27:27,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:27:26" (1/3) ... [2023-12-21 15:27:27,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c07134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:27, skipping insertion in model container [2023-12-21 15:27:27,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:26" (2/3) ... [2023-12-21 15:27:27,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c07134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:27, skipping insertion in model container [2023-12-21 15:27:27,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:27" (3/3) ... [2023-12-21 15:27:27,286 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-12-21 15:27:27,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 15:27:27,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 15:27:27,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 15:27:27,332 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;@5baae96e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 15:27:27,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 15:27:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 15:27:27,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:27,373 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] [2023-12-21 15:27:27,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:27,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash -707728986, now seen corresponding path program 1 times [2023-12-21 15:27:27,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:27,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488370490] [2023-12-21 15:27:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:27,386 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 [2023-12-21 15:27:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:27,388 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) [2023-12-21 15:27:27,389 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 [2023-12-21 15:27:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:27,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 15:27:27,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 15:27:27,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:27,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488370490] [2023-12-21 15:27:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488370490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:27,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:27,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 15:27:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664797631] [2023-12-21 15:27:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:27,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 15:27:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 15:27:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 15:27:27,553 INFO L87 Difference]: Start difference. First operand has 50 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 15:27:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:27,588 INFO L93 Difference]: Finished difference Result 98 states and 160 transitions. [2023-12-21 15:27:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 15:27:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-12-21 15:27:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:27,598 INFO L225 Difference]: With dead ends: 98 [2023-12-21 15:27:27,598 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 15:27:27,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 15:27:27,605 INFO L413 NwaCegarLoop]: 67 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, 67 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:27,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 15:27:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-12-21 15:27:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 40 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 15:27:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2023-12-21 15:27:27,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 23 [2023-12-21 15:27:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:27,633 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2023-12-21 15:27:27,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 15:27:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2023-12-21 15:27:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 15:27:27,635 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:27,635 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] [2023-12-21 15:27:27,642 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 [2023-12-21 15:27:27,836 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 [2023-12-21 15:27:27,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:27,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1489726182, now seen corresponding path program 1 times [2023-12-21 15:27:27,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:27,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484082939] [2023-12-21 15:27:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:27,838 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 [2023-12-21 15:27:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:27,840 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) [2023-12-21 15:27:27,841 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 [2023-12-21 15:27:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:27,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 15:27:27,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:27,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:27,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:27,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484082939] [2023-12-21 15:27:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484082939] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:27,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:27,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 15:27:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842259307] [2023-12-21 15:27:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 15:27:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 15:27:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 15:27:27,952 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:28,001 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2023-12-21 15:27:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 15:27:28,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-12-21 15:27:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:28,003 INFO L225 Difference]: With dead ends: 77 [2023-12-21 15:27:28,003 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 15:27:28,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 15:27:28,004 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:28,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 175 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 15:27:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2023-12-21 15:27:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 42 states have internal predecessors, (54), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 15:27:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2023-12-21 15:27:28,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 23 [2023-12-21 15:27:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:28,014 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2023-12-21 15:27:28,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2023-12-21 15:27:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 15:27:28,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:28,016 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, 1, 1, 1] [2023-12-21 15:27:28,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-21 15:27:28,219 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 [2023-12-21 15:27:28,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2012976157, now seen corresponding path program 1 times [2023-12-21 15:27:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555927727] [2023-12-21 15:27:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:28,222 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 [2023-12-21 15:27:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:28,223 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) [2023-12-21 15:27:28,227 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 [2023-12-21 15:27:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:28,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 15:27:28,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 15:27:28,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:28,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:28,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555927727] [2023-12-21 15:27:28,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555927727] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 15:27:28,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 15:27:28,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-12-21 15:27:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875016244] [2023-12-21 15:27:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:28,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 15:27:28,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 15:27:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:27:28,632 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:28,755 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2023-12-21 15:27:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 15:27:28,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-12-21 15:27:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:28,757 INFO L225 Difference]: With dead ends: 102 [2023-12-21 15:27:28,758 INFO L226 Difference]: Without dead ends: 68 [2023-12-21 15:27:28,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-21 15:27:28,759 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:28,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 252 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-21 15:27:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2023-12-21 15:27:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 59 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 15:27:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2023-12-21 15:27:28,770 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 26 [2023-12-21 15:27:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:28,770 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2023-12-21 15:27:28,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2023-12-21 15:27:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 15:27:28,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:28,771 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, 1, 1, 1, 1] [2023-12-21 15:27:28,787 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 [2023-12-21 15:27:28,971 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 [2023-12-21 15:27:28,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:28,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1546106036, now seen corresponding path program 1 times [2023-12-21 15:27:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345675175] [2023-12-21 15:27:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:28,973 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 [2023-12-21 15:27:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:28,992 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) [2023-12-21 15:27:29,008 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 [2023-12-21 15:27:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:29,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 15:27:29,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:29,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:29,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345675175] [2023-12-21 15:27:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345675175] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:29,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-21 15:27:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603973469] [2023-12-21 15:27:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 15:27:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 15:27:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-21 15:27:29,200 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 15:27:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:29,379 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2023-12-21 15:27:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 15:27:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-21 15:27:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:29,380 INFO L225 Difference]: With dead ends: 82 [2023-12-21 15:27:29,380 INFO L226 Difference]: Without dead ends: 63 [2023-12-21 15:27:29,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:27:29,381 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 68 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:29,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 254 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-21 15:27:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-12-21 15:27:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 56 states have internal predecessors, (70), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 15:27:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2023-12-21 15:27:29,387 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 27 [2023-12-21 15:27:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:29,387 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2023-12-21 15:27:29,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 15:27:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2023-12-21 15:27:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 15:27:29,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:29,388 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, 1, 1, 1, 1] [2023-12-21 15:27:29,394 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 [2023-12-21 15:27:29,594 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 [2023-12-21 15:27:29,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:29,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -461543356, now seen corresponding path program 1 times [2023-12-21 15:27:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:29,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640566571] [2023-12-21 15:27:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:29,596 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 [2023-12-21 15:27:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:29,602 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2023-12-21 15:27:29,603 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 (6)] Waiting until timeout for monitored process [2023-12-21 15:27:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:29,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 15:27:29,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:29,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 15:27:30,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:30,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640566571] [2023-12-21 15:27:30,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640566571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:30,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:30,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-21 15:27:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211583210] [2023-12-21 15:27:30,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 15:27:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 15:27:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:27:30,113 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:30,517 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2023-12-21 15:27:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 15:27:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-21 15:27:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:30,518 INFO L225 Difference]: With dead ends: 111 [2023-12-21 15:27:30,518 INFO L226 Difference]: Without dead ends: 109 [2023-12-21 15:27:30,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-12-21 15:27:30,519 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 256 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:30,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 492 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:27:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-21 15:27:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2023-12-21 15:27:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 73 states have internal predecessors, (94), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-12-21 15:27:30,527 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 27 [2023-12-21 15:27:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:30,527 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-12-21 15:27:30,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-12-21 15:27:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 15:27:30,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:30,528 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, 1, 1, 1, 1, 1] [2023-12-21 15:27:30,544 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 (6)] Ended with exit code 0 [2023-12-21 15:27:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /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 [2023-12-21 15:27:30,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:30,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2143565419, now seen corresponding path program 1 times [2023-12-21 15:27:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531205809] [2023-12-21 15:27:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:30,733 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 [2023-12-21 15:27:30,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:30,736 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) [2023-12-21 15:27:30,743 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 [2023-12-21 15:27:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:30,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 15:27:30,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:30,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 15:27:31,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531205809] [2023-12-21 15:27:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531205809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:31,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 15:27:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843255723] [2023-12-21 15:27:31,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 15:27:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 15:27:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-21 15:27:31,164 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:31,661 INFO L93 Difference]: Finished difference Result 125 states and 172 transitions. [2023-12-21 15:27:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 15:27:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-12-21 15:27:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:31,663 INFO L225 Difference]: With dead ends: 125 [2023-12-21 15:27:31,663 INFO L226 Difference]: Without dead ends: 110 [2023-12-21 15:27:31,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-12-21 15:27:31,664 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 283 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:31,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 405 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:27:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-21 15:27:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2023-12-21 15:27:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 73 states have internal predecessors, (93), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2023-12-21 15:27:31,674 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 28 [2023-12-21 15:27:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:31,674 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2023-12-21 15:27:31,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2023-12-21 15:27:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 15:27:31,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:31,675 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, 1, 1, 1, 1] [2023-12-21 15:27:31,684 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 [2023-12-21 15:27:31,875 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 [2023-12-21 15:27:31,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 137763069, now seen corresponding path program 2 times [2023-12-21 15:27:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:31,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933432774] [2023-12-21 15:27:31,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:31,876 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 [2023-12-21 15:27:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:31,893 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) [2023-12-21 15:27:31,917 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 [2023-12-21 15:27:31,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:31,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 15:27:31,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:32,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:32,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933432774] [2023-12-21 15:27:32,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933432774] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:32,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:32,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-21 15:27:32,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514338652] [2023-12-21 15:27:32,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:32,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 15:27:32,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 15:27:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-21 15:27:32,075 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:32,270 INFO L93 Difference]: Finished difference Result 184 states and 245 transitions. [2023-12-21 15:27:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 15:27:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-12-21 15:27:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:32,272 INFO L225 Difference]: With dead ends: 184 [2023-12-21 15:27:32,272 INFO L226 Difference]: Without dead ends: 118 [2023-12-21 15:27:32,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:27:32,273 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 23 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:32,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 364 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 15:27:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-21 15:27:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2023-12-21 15:27:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3580246913580247) internal successors, (110), 86 states have internal predecessors, (110), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2023-12-21 15:27:32,280 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 28 [2023-12-21 15:27:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:32,280 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2023-12-21 15:27:32,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2023-12-21 15:27:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 15:27:32,281 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:32,281 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, 1, 1, 1, 1, 1] [2023-12-21 15:27:32,298 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 [2023-12-21 15:27:32,484 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 [2023-12-21 15:27:32,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:32,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash -752771886, now seen corresponding path program 2 times [2023-12-21 15:27:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:32,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409736049] [2023-12-21 15:27:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:32,486 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 [2023-12-21 15:27:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:32,487 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) [2023-12-21 15:27:32,491 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 [2023-12-21 15:27:32,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:32,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:32,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 15:27:32,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:32,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:32,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:32,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409736049] [2023-12-21 15:27:32,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409736049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:32,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 15:27:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276317559] [2023-12-21 15:27:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:32,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 15:27:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 15:27:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 15:27:32,604 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:32,668 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2023-12-21 15:27:32,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 15:27:32,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-12-21 15:27:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:32,671 INFO L225 Difference]: With dead ends: 121 [2023-12-21 15:27:32,672 INFO L226 Difference]: Without dead ends: 108 [2023-12-21 15:27:32,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 15:27:32,672 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:32,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-21 15:27:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2023-12-21 15:27:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 84 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2023-12-21 15:27:32,679 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 29 [2023-12-21 15:27:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:32,679 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2023-12-21 15:27:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2023-12-21 15:27:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 15:27:32,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:32,680 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, 1, 1, 1, 1, 1] [2023-12-21 15:27:32,685 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 [2023-12-21 15:27:32,882 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 [2023-12-21 15:27:32,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:32,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 486177104, now seen corresponding path program 1 times [2023-12-21 15:27:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:32,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50728957] [2023-12-21 15:27:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:32,883 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 [2023-12-21 15:27:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:32,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-21 15:27:32,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-21 15:27:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:32,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 15:27:32,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:33,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 15:27:33,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50728957] [2023-12-21 15:27:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50728957] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:33,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:33,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-12-21 15:27:33,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851708016] [2023-12-21 15:27:33,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:33,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 15:27:33,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 15:27:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-21 15:27:33,581 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:34,166 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2023-12-21 15:27:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 15:27:34,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-12-21 15:27:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:34,167 INFO L225 Difference]: With dead ends: 163 [2023-12-21 15:27:34,167 INFO L226 Difference]: Without dead ends: 161 [2023-12-21 15:27:34,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-12-21 15:27:34,168 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 405 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:34,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 910 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 15:27:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-21 15:27:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2023-12-21 15:27:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 90 states have internal predecessors, (117), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2023-12-21 15:27:34,175 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 29 [2023-12-21 15:27:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:34,175 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2023-12-21 15:27:34,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2023-12-21 15:27:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 15:27:34,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:34,176 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:34,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:34,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-21 15:27:34,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:34,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1474139541, now seen corresponding path program 1 times [2023-12-21 15:27:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102607081] [2023-12-21 15:27:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:34,380 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 [2023-12-21 15:27:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:34,381 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) [2023-12-21 15:27:34,385 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 [2023-12-21 15:27:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:34,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 15:27:34,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:34,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:34,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:34,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102607081] [2023-12-21 15:27:34,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102607081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:34,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:34,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 15:27:34,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716268371] [2023-12-21 15:27:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:34,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 15:27:34,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 15:27:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 15:27:34,458 INFO L87 Difference]: Start difference. First operand 97 states and 132 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:34,487 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2023-12-21 15:27:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 15:27:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-12-21 15:27:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:34,489 INFO L225 Difference]: With dead ends: 114 [2023-12-21 15:27:34,489 INFO L226 Difference]: Without dead ends: 84 [2023-12-21 15:27:34,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 15:27:34,490 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:34,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-21 15:27:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-21 15:27:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.375) internal successors, (99), 77 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 15:27:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2023-12-21 15:27:34,495 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 30 [2023-12-21 15:27:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:34,495 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2023-12-21 15:27:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2023-12-21 15:27:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 15:27:34,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:34,496 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, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:34,515 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 [2023-12-21 15:27:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-21 15:27:34,697 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:34,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1458128607, now seen corresponding path program 1 times [2023-12-21 15:27:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:34,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582714445] [2023-12-21 15:27:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:34,697 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 [2023-12-21 15:27:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:34,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-21 15:27:34,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-21 15:27:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:34,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 15:27:34,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:34,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:35,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582714445] [2023-12-21 15:27:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582714445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:35,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:35,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-12-21 15:27:35,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224712086] [2023-12-21 15:27:35,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:35,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 15:27:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 15:27:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-12-21 15:27:35,342 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:36,340 INFO L93 Difference]: Finished difference Result 205 states and 281 transitions. [2023-12-21 15:27:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 15:27:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-12-21 15:27:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:36,341 INFO L225 Difference]: With dead ends: 205 [2023-12-21 15:27:36,341 INFO L226 Difference]: Without dead ends: 177 [2023-12-21 15:27:36,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 15:27:36,342 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 509 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:36,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 790 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:27:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-21 15:27:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 103. [2023-12-21 15:27:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 95 states have internal predecessors, (122), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 139 transitions. [2023-12-21 15:27:36,351 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 139 transitions. Word has length 30 [2023-12-21 15:27:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:36,351 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 139 transitions. [2023-12-21 15:27:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 139 transitions. [2023-12-21 15:27:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 15:27:36,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:36,352 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:36,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-21 15:27:36,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:36,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 894033865, now seen corresponding path program 2 times [2023-12-21 15:27:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158594992] [2023-12-21 15:27:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:36,556 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 [2023-12-21 15:27:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:36,557 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2023-12-21 15:27:36,559 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 (13)] Waiting until timeout for monitored process [2023-12-21 15:27:36,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:36,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:36,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 15:27:36,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 15:27:36,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:36,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158594992] [2023-12-21 15:27:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158594992] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:36,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:36,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 15:27:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469296604] [2023-12-21 15:27:36,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:36,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 15:27:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 15:27:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-21 15:27:36,727 INFO L87 Difference]: Start difference. First operand 103 states and 139 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:36,917 INFO L93 Difference]: Finished difference Result 188 states and 251 transitions. [2023-12-21 15:27:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 15:27:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-12-21 15:27:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:36,919 INFO L225 Difference]: With dead ends: 188 [2023-12-21 15:27:36,919 INFO L226 Difference]: Without dead ends: 136 [2023-12-21 15:27:36,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-21 15:27:36,919 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:36,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 252 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-21 15:27:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-12-21 15:27:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 104 states have internal predecessors, (134), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 151 transitions. [2023-12-21 15:27:36,926 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 151 transitions. Word has length 30 [2023-12-21 15:27:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:36,926 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 151 transitions. [2023-12-21 15:27:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 151 transitions. [2023-12-21 15:27:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 15:27:36,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:36,927 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:36,935 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 (13)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /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 [2023-12-21 15:27:37,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:37,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1876573838, now seen corresponding path program 1 times [2023-12-21 15:27:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568215338] [2023-12-21 15:27:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:37,136 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 [2023-12-21 15:27:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:37,138 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) [2023-12-21 15:27:37,139 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 [2023-12-21 15:27:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:37,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 15:27:37,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:37,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:37,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:37,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568215338] [2023-12-21 15:27:37,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568215338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:37,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:37,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 15:27:37,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215134812] [2023-12-21 15:27:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 15:27:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 15:27:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 15:27:37,241 INFO L87 Difference]: Start difference. First operand 112 states and 151 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:37,284 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2023-12-21 15:27:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 15:27:37,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-12-21 15:27:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:37,285 INFO L225 Difference]: With dead ends: 156 [2023-12-21 15:27:37,285 INFO L226 Difference]: Without dead ends: 118 [2023-12-21 15:27:37,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 15:27:37,287 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:37,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-21 15:27:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2023-12-21 15:27:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 107 states have internal predecessors, (137), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2023-12-21 15:27:37,298 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 31 [2023-12-21 15:27:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:37,298 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2023-12-21 15:27:37,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2023-12-21 15:27:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 15:27:37,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:37,299 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:37,304 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 [2023-12-21 15:27:37,504 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 [2023-12-21 15:27:37,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:37,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1216786310, now seen corresponding path program 2 times [2023-12-21 15:27:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359819715] [2023-12-21 15:27:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:37,505 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 [2023-12-21 15:27:37,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:37,506 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) [2023-12-21 15:27:37,507 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 [2023-12-21 15:27:37,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:37,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 15:27:37,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 15:27:37,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:37,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:37,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359819715] [2023-12-21 15:27:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359819715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:37,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:37,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 15:27:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716852060] [2023-12-21 15:27:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 15:27:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 15:27:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 15:27:37,598 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:37,660 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2023-12-21 15:27:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 15:27:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-12-21 15:27:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:37,661 INFO L225 Difference]: With dead ends: 130 [2023-12-21 15:27:37,661 INFO L226 Difference]: Without dead ends: 115 [2023-12-21 15:27:37,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 15:27:37,661 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:37,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-21 15:27:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-21 15:27:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 107 states have internal predecessors, (136), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2023-12-21 15:27:37,667 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 31 [2023-12-21 15:27:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2023-12-21 15:27:37,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2023-12-21 15:27:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 15:27:37,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:37,670 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:37,675 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 (15)] Ended with exit code 0 [2023-12-21 15:27:37,875 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 [2023-12-21 15:27:37,875 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:37,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1430319555, now seen corresponding path program 1 times [2023-12-21 15:27:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:37,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914779062] [2023-12-21 15:27:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:37,876 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 [2023-12-21 15:27:37,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:37,877 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2023-12-21 15:27:37,885 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 (16)] Waiting until timeout for monitored process [2023-12-21 15:27:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:37,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 15:27:37,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:38,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:38,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914779062] [2023-12-21 15:27:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914779062] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:38,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2023-12-21 15:27:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582794210] [2023-12-21 15:27:38,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:38,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 15:27:38,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 15:27:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:27:38,499 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:39,564 INFO L93 Difference]: Finished difference Result 268 states and 370 transitions. [2023-12-21 15:27:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 15:27:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-12-21 15:27:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:39,565 INFO L225 Difference]: With dead ends: 268 [2023-12-21 15:27:39,565 INFO L226 Difference]: Without dead ends: 218 [2023-12-21 15:27:39,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 15:27:39,566 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 338 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:39,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1087 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:27:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-21 15:27:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 116. [2023-12-21 15:27:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 108 states have internal predecessors, (137), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2023-12-21 15:27:39,574 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 33 [2023-12-21 15:27:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:39,574 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2023-12-21 15:27:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2023-12-21 15:27:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 15:27:39,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:39,575 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:39,580 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 (16)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:39,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /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 [2023-12-21 15:27:39,775 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:39,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 131380258, now seen corresponding path program 2 times [2023-12-21 15:27:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:39,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744758848] [2023-12-21 15:27:39,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:39,776 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 [2023-12-21 15:27:39,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:39,777 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2023-12-21 15:27:39,788 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 (17)] Waiting until timeout for monitored process [2023-12-21 15:27:39,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:39,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 15:27:39,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 15:27:39,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:39,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744758848] [2023-12-21 15:27:39,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744758848] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:39,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:39,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 15:27:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319552663] [2023-12-21 15:27:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 15:27:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 15:27:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 15:27:39,904 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:40,008 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2023-12-21 15:27:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 15:27:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-12-21 15:27:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:40,009 INFO L225 Difference]: With dead ends: 122 [2023-12-21 15:27:40,009 INFO L226 Difference]: Without dead ends: 120 [2023-12-21 15:27:40,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-21 15:27:40,010 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:40,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 179 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-21 15:27:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-21 15:27:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 106 states have (on average 1.320754716981132) internal successors, (140), 111 states have internal predecessors, (140), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2023-12-21 15:27:40,016 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 34 [2023-12-21 15:27:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2023-12-21 15:27:40,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2023-12-21 15:27:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 15:27:40,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:40,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:40,020 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 (17)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /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 [2023-12-21 15:27:40,220 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:40,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1314355305, now seen corresponding path program 1 times [2023-12-21 15:27:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813842474] [2023-12-21 15:27:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:40,220 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 [2023-12-21 15:27:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:40,221 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2023-12-21 15:27:40,250 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 (18)] Waiting until timeout for monitored process [2023-12-21 15:27:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:40,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 15:27:40,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:40,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:40,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813842474] [2023-12-21 15:27:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813842474] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:40,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-12-21 15:27:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439314996] [2023-12-21 15:27:40,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 15:27:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 15:27:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-21 15:27:40,628 INFO L87 Difference]: Start difference. First operand 120 states and 157 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:40,998 INFO L93 Difference]: Finished difference Result 184 states and 247 transitions. [2023-12-21 15:27:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 15:27:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-21 15:27:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:41,000 INFO L225 Difference]: With dead ends: 184 [2023-12-21 15:27:41,000 INFO L226 Difference]: Without dead ends: 169 [2023-12-21 15:27:41,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-12-21 15:27:41,000 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 242 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:41,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 412 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:27:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-21 15:27:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 132. [2023-12-21 15:27:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 123 states have internal predecessors, (158), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 175 transitions. [2023-12-21 15:27:41,009 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 175 transitions. Word has length 36 [2023-12-21 15:27:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:41,009 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 175 transitions. [2023-12-21 15:27:41,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 175 transitions. [2023-12-21 15:27:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 15:27:41,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:41,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:41,015 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 (18)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /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 [2023-12-21 15:27:41,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash -991028947, now seen corresponding path program 1 times [2023-12-21 15:27:41,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:41,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322935621] [2023-12-21 15:27:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:41,214 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 [2023-12-21 15:27:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:41,215 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2023-12-21 15:27:41,226 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 (19)] Waiting until timeout for monitored process [2023-12-21 15:27:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:41,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 15:27:41,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 15:27:41,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:41,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:41,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322935621] [2023-12-21 15:27:41,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322935621] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:41,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:41,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-12-21 15:27:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690007537] [2023-12-21 15:27:41,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:41,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 15:27:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 15:27:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-21 15:27:41,519 INFO L87 Difference]: Start difference. First operand 132 states and 175 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:41,816 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2023-12-21 15:27:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 15:27:41,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-21 15:27:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:41,817 INFO L225 Difference]: With dead ends: 193 [2023-12-21 15:27:41,817 INFO L226 Difference]: Without dead ends: 146 [2023-12-21 15:27:41,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:27:41,818 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 105 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:41,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 397 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 15:27:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-21 15:27:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2023-12-21 15:27:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 119 states have internal predecessors, (150), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2023-12-21 15:27:41,828 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 36 [2023-12-21 15:27:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:41,828 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2023-12-21 15:27:41,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2023-12-21 15:27:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 15:27:41,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:41,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:41,833 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 (19)] Ended with exit code 0 [2023-12-21 15:27:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /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 [2023-12-21 15:27:42,032 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -529037360, now seen corresponding path program 2 times [2023-12-21 15:27:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855137378] [2023-12-21 15:27:42,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:42,033 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 [2023-12-21 15:27:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:42,034 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2023-12-21 15:27:42,036 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 (20)] Waiting until timeout for monitored process [2023-12-21 15:27:42,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:27:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:42,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 15:27:42,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 15:27:42,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:42,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855137378] [2023-12-21 15:27:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855137378] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 15:27:42,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 15:27:42,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2023-12-21 15:27:42,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300407136] [2023-12-21 15:27:42,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:42,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 15:27:42,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 15:27:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-12-21 15:27:42,546 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:42,638 INFO L93 Difference]: Finished difference Result 151 states and 198 transitions. [2023-12-21 15:27:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 15:27:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-21 15:27:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:42,639 INFO L225 Difference]: With dead ends: 151 [2023-12-21 15:27:42,639 INFO L226 Difference]: Without dead ends: 142 [2023-12-21 15:27:42,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-12-21 15:27:42,640 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:42,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 131 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-21 15:27:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2023-12-21 15:27:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 118 states have (on average 1.3135593220338984) internal successors, (155), 123 states have internal predecessors, (155), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 15:27:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-12-21 15:27:42,648 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 37 [2023-12-21 15:27:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:42,648 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-12-21 15:27:42,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-12-21 15:27:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 15:27:42,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:42,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:42,652 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 (20)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /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 [2023-12-21 15:27:42,852 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:42,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1500838945, now seen corresponding path program 1 times [2023-12-21 15:27:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199730213] [2023-12-21 15:27:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:42,852 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 [2023-12-21 15:27:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:42,853 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2023-12-21 15:27:42,854 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 (21)] Waiting until timeout for monitored process [2023-12-21 15:27:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:42,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 15:27:42,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:43,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 15:27:43,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:43,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199730213] [2023-12-21 15:27:43,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199730213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:43,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:43,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-12-21 15:27:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312184568] [2023-12-21 15:27:43,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 15:27:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 15:27:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:27:43,479 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:44,188 INFO L93 Difference]: Finished difference Result 213 states and 286 transitions. [2023-12-21 15:27:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 15:27:44,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-12-21 15:27:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:44,189 INFO L225 Difference]: With dead ends: 213 [2023-12-21 15:27:44,189 INFO L226 Difference]: Without dead ends: 182 [2023-12-21 15:27:44,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2023-12-21 15:27:44,190 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 355 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:44,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 857 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 15:27:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-21 15:27:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 143. [2023-12-21 15:27:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 128 states have (on average 1.296875) internal successors, (166), 133 states have internal predecessors, (166), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2023-12-21 15:27:44,201 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 38 [2023-12-21 15:27:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:44,201 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2023-12-21 15:27:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2023-12-21 15:27:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 15:27:44,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:44,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:44,214 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 (21)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:44,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /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 [2023-12-21 15:27:44,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:44,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash 488744099, now seen corresponding path program 1 times [2023-12-21 15:27:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:44,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992174142] [2023-12-21 15:27:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:44,406 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 [2023-12-21 15:27:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:44,407 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2023-12-21 15:27:44,438 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 (22)] Waiting until timeout for monitored process [2023-12-21 15:27:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:44,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 15:27:44,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:44,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:45,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992174142] [2023-12-21 15:27:45,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992174142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:45,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2023-12-21 15:27:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087645205] [2023-12-21 15:27:45,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:45,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 15:27:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 15:27:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-12-21 15:27:45,019 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:45,807 INFO L93 Difference]: Finished difference Result 250 states and 330 transitions. [2023-12-21 15:27:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 15:27:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-12-21 15:27:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:45,808 INFO L225 Difference]: With dead ends: 250 [2023-12-21 15:27:45,808 INFO L226 Difference]: Without dead ends: 241 [2023-12-21 15:27:45,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 15:27:45,809 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 444 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:45,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1002 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 15:27:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-21 15:27:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 180. [2023-12-21 15:27:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 1.3151515151515152) internal successors, (217), 170 states have internal predecessors, (217), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 236 transitions. [2023-12-21 15:27:45,822 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 236 transitions. Word has length 38 [2023-12-21 15:27:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:45,822 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 236 transitions. [2023-12-21 15:27:45,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 236 transitions. [2023-12-21 15:27:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 15:27:45,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:45,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:45,833 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 (22)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:46,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /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 [2023-12-21 15:27:46,026 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 172256907, now seen corresponding path program 1 times [2023-12-21 15:27:46,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:46,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338712346] [2023-12-21 15:27:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:46,027 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 [2023-12-21 15:27:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:46,028 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2023-12-21 15:27:46,029 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 (23)] Waiting until timeout for monitored process [2023-12-21 15:27:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:46,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 15:27:46,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:27:46,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:27:46,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338712346] [2023-12-21 15:27:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338712346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:46,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-21 15:27:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410255647] [2023-12-21 15:27:46,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 15:27:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 15:27:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:27:46,179 INFO L87 Difference]: Start difference. First operand 180 states and 236 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:46,360 INFO L93 Difference]: Finished difference Result 284 states and 381 transitions. [2023-12-21 15:27:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 15:27:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-12-21 15:27:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:46,365 INFO L225 Difference]: With dead ends: 284 [2023-12-21 15:27:46,365 INFO L226 Difference]: Without dead ends: 252 [2023-12-21 15:27:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-12-21 15:27:46,366 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 76 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:46,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 478 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-21 15:27:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 233. [2023-12-21 15:27:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 223 states have internal predecessors, (293), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 312 transitions. [2023-12-21 15:27:46,398 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 312 transitions. Word has length 40 [2023-12-21 15:27:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:46,399 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 312 transitions. [2023-12-21 15:27:46,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 312 transitions. [2023-12-21 15:27:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 15:27:46,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:46,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:46,405 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 (23)] Ended with exit code 0 [2023-12-21 15:27:46,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 [2023-12-21 15:27:46,605 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:46,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 852315277, now seen corresponding path program 1 times [2023-12-21 15:27:46,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271771625] [2023-12-21 15:27:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:46,606 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 [2023-12-21 15:27:46,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:46,607 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2023-12-21 15:27:46,612 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 (24)] Waiting until timeout for monitored process [2023-12-21 15:27:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:46,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 15:27:46,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:46,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:27:46,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:27:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:46,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:47,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:27:47,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2023-12-21 15:27:47,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:27:47,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2023-12-21 15:27:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:47,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:47,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271771625] [2023-12-21 15:27:47,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271771625] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:47,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:47,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 15:27:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778104887] [2023-12-21 15:27:47,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 15:27:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 15:27:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-12-21 15:27:47,212 INFO L87 Difference]: Start difference. First operand 233 states and 312 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:47,835 INFO L93 Difference]: Finished difference Result 477 states and 648 transitions. [2023-12-21 15:27:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 15:27:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-12-21 15:27:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:47,837 INFO L225 Difference]: With dead ends: 477 [2023-12-21 15:27:47,837 INFO L226 Difference]: Without dead ends: 402 [2023-12-21 15:27:47,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-12-21 15:27:47,838 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:47,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 484 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 15:27:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-12-21 15:27:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 293. [2023-12-21 15:27:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 278 states have (on average 1.356115107913669) internal successors, (377), 283 states have internal predecessors, (377), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 396 transitions. [2023-12-21 15:27:47,860 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 396 transitions. Word has length 40 [2023-12-21 15:27:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:47,860 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 396 transitions. [2023-12-21 15:27:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 396 transitions. [2023-12-21 15:27:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 15:27:47,861 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:47,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:47,865 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 (24)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /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 [2023-12-21 15:27:48,065 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:48,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1616755627, now seen corresponding path program 2 times [2023-12-21 15:27:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649353174] [2023-12-21 15:27:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:48,065 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 [2023-12-21 15:27:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:48,066 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2023-12-21 15:27:48,076 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 (25)] Waiting until timeout for monitored process [2023-12-21 15:27:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:48,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 15:27:48,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 15:27:48,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:48,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649353174] [2023-12-21 15:27:48,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649353174] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:48,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:48,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 15:27:48,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896154851] [2023-12-21 15:27:48,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:48,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 15:27:48,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:48,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 15:27:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 15:27:48,225 INFO L87 Difference]: Start difference. First operand 293 states and 396 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:48,386 INFO L93 Difference]: Finished difference Result 389 states and 521 transitions. [2023-12-21 15:27:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 15:27:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-12-21 15:27:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:48,388 INFO L225 Difference]: With dead ends: 389 [2023-12-21 15:27:48,388 INFO L226 Difference]: Without dead ends: 378 [2023-12-21 15:27:48,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 15:27:48,388 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:48,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 221 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-12-21 15:27:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 289. [2023-12-21 15:27:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 274 states have (on average 1.354014598540146) internal successors, (371), 279 states have internal predecessors, (371), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 390 transitions. [2023-12-21 15:27:48,414 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 390 transitions. Word has length 40 [2023-12-21 15:27:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:48,414 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 390 transitions. [2023-12-21 15:27:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 390 transitions. [2023-12-21 15:27:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 15:27:48,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:48,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:48,426 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 (25)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:48,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 [2023-12-21 15:27:48,621 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:48,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -688628625, now seen corresponding path program 2 times [2023-12-21 15:27:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:48,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345627638] [2023-12-21 15:27:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:48,622 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 [2023-12-21 15:27:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:48,623 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2023-12-21 15:27:48,625 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 (26)] Waiting until timeout for monitored process [2023-12-21 15:27:48,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 15:27:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:48,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 15:27:48,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 15:27:48,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 15:27:48,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:48,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345627638] [2023-12-21 15:27:48,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345627638] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 15:27:48,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 15:27:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-21 15:27:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200042700] [2023-12-21 15:27:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 15:27:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 15:27:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-21 15:27:48,886 INFO L87 Difference]: Start difference. First operand 289 states and 390 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:49,006 INFO L93 Difference]: Finished difference Result 299 states and 399 transitions. [2023-12-21 15:27:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 15:27:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-12-21 15:27:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:49,008 INFO L225 Difference]: With dead ends: 299 [2023-12-21 15:27:49,008 INFO L226 Difference]: Without dead ends: 290 [2023-12-21 15:27:49,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-21 15:27:49,009 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 55 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:49,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:27:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-21 15:27:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 263. [2023-12-21 15:27:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 248 states have (on average 1.342741935483871) internal successors, (333), 253 states have internal predecessors, (333), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2023-12-21 15:27:49,045 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 40 [2023-12-21 15:27:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:49,045 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2023-12-21 15:27:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2023-12-21 15:27:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 15:27:49,047 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:49,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:49,066 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 (26)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:49,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /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 [2023-12-21 15:27:49,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:49,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2032720808, now seen corresponding path program 1 times [2023-12-21 15:27:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:49,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283380892] [2023-12-21 15:27:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:49,251 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 [2023-12-21 15:27:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:49,252 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2023-12-21 15:27:49,253 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 (27)] Waiting until timeout for monitored process [2023-12-21 15:27:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:49,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 15:27:49,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:49,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:27:49,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283380892] [2023-12-21 15:27:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283380892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:27:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:27:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 15:27:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69288527] [2023-12-21 15:27:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:27:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 15:27:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 15:27:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 15:27:49,344 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:27:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:49,395 INFO L93 Difference]: Finished difference Result 288 states and 386 transitions. [2023-12-21 15:27:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 15:27:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-21 15:27:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:49,397 INFO L225 Difference]: With dead ends: 288 [2023-12-21 15:27:49,397 INFO L226 Difference]: Without dead ends: 270 [2023-12-21 15:27:49,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 15:27:49,397 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 108 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 15:27:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-12-21 15:27:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2023-12-21 15:27:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 252 states have (on average 1.3452380952380953) internal successors, (339), 257 states have internal predecessors, (339), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 358 transitions. [2023-12-21 15:27:49,421 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 358 transitions. Word has length 43 [2023-12-21 15:27:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:49,422 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 358 transitions. [2023-12-21 15:27:49,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:27:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 358 transitions. [2023-12-21 15:27:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 15:27:49,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:49,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:49,450 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 (27)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:49,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /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 [2023-12-21 15:27:49,626 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:49,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 51286185, now seen corresponding path program 1 times [2023-12-21 15:27:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:49,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669531195] [2023-12-21 15:27:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:49,627 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 [2023-12-21 15:27:49,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:49,641 INFO L229 MonitoredProcess]: Starting monitored process 28 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) [2023-12-21 15:27:49,642 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 (28)] Waiting until timeout for monitored process [2023-12-21 15:27:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:49,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 15:27:49,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:50,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:50,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669531195] [2023-12-21 15:27:50,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669531195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:50,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:50,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2023-12-21 15:27:50,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865274226] [2023-12-21 15:27:50,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 15:27:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 15:27:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-12-21 15:27:50,541 INFO L87 Difference]: Start difference. First operand 267 states and 358 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:52,203 INFO L93 Difference]: Finished difference Result 558 states and 767 transitions. [2023-12-21 15:27:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 15:27:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-12-21 15:27:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:52,206 INFO L225 Difference]: With dead ends: 558 [2023-12-21 15:27:52,206 INFO L226 Difference]: Without dead ends: 545 [2023-12-21 15:27:52,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 15:27:52,207 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 344 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:52,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1818 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 15:27:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-12-21 15:27:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 281. [2023-12-21 15:27:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 271 states have internal predecessors, (357), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:27:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 376 transitions. [2023-12-21 15:27:52,240 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 376 transitions. Word has length 42 [2023-12-21 15:27:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:52,240 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 376 transitions. [2023-12-21 15:27:52,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 376 transitions. [2023-12-21 15:27:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 15:27:52,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:52,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:52,258 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 (28)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:52,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /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 [2023-12-21 15:27:52,445 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:52,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:52,445 INFO L85 PathProgramCache]: Analyzing trace with hash -584905963, now seen corresponding path program 2 times [2023-12-21 15:27:52,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:52,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971472903] [2023-12-21 15:27:52,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:52,446 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 [2023-12-21 15:27:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:52,447 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2023-12-21 15:27:52,448 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 (29)] Waiting until timeout for monitored process [2023-12-21 15:27:52,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:27:52,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:52,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 15:27:52,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:52,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:27:53,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971472903] [2023-12-21 15:27:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971472903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:53,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-12-21 15:27:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356840749] [2023-12-21 15:27:53,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 15:27:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 15:27:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-12-21 15:27:53,295 INFO L87 Difference]: Start difference. First operand 281 states and 376 transitions. Second operand has 25 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:54,548 INFO L93 Difference]: Finished difference Result 698 states and 955 transitions. [2023-12-21 15:27:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 15:27:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-12-21 15:27:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:54,550 INFO L225 Difference]: With dead ends: 698 [2023-12-21 15:27:54,551 INFO L226 Difference]: Without dead ends: 670 [2023-12-21 15:27:54,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 15:27:54,551 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 606 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:54,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1268 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 15:27:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-12-21 15:27:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 329. [2023-12-21 15:27:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 313 states have (on average 1.3610223642172523) internal successors, (426), 319 states have internal predecessors, (426), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 15:27:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 447 transitions. [2023-12-21 15:27:54,597 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 447 transitions. Word has length 42 [2023-12-21 15:27:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:54,597 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 447 transitions. [2023-12-21 15:27:54,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 447 transitions. [2023-12-21 15:27:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 15:27:54,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:54,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:54,615 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 (29)] Ended with exit code 0 [2023-12-21 15:27:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /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 [2023-12-21 15:27:54,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash 780153543, now seen corresponding path program 1 times [2023-12-21 15:27:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:54,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203130137] [2023-12-21 15:27:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:54,803 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 [2023-12-21 15:27:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:54,804 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2023-12-21 15:27:54,805 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 (30)] Waiting until timeout for monitored process [2023-12-21 15:27:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:54,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 15:27:54,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 15:27:55,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:55,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:55,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203130137] [2023-12-21 15:27:55,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203130137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:55,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-12-21 15:27:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848112978] [2023-12-21 15:27:55,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:55,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 15:27:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 15:27:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-21 15:27:55,142 INFO L87 Difference]: Start difference. First operand 329 states and 447 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:27:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:55,510 INFO L93 Difference]: Finished difference Result 452 states and 605 transitions. [2023-12-21 15:27:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 15:27:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-21 15:27:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:55,512 INFO L225 Difference]: With dead ends: 452 [2023-12-21 15:27:55,512 INFO L226 Difference]: Without dead ends: 372 [2023-12-21 15:27:55,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:27:55,513 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:55,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 486 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:27:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-12-21 15:27:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 319. [2023-12-21 15:27:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 303 states have (on average 1.3432343234323432) internal successors, (407), 309 states have internal predecessors, (407), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 15:27:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 428 transitions. [2023-12-21 15:27:55,543 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 428 transitions. Word has length 43 [2023-12-21 15:27:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:55,543 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 428 transitions. [2023-12-21 15:27:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:27:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 428 transitions. [2023-12-21 15:27:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-21 15:27:55,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:55,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:55,549 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 (30)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /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 [2023-12-21 15:27:55,747 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1038195707, now seen corresponding path program 1 times [2023-12-21 15:27:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313580047] [2023-12-21 15:27:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:27:55,748 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 [2023-12-21 15:27:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:55,749 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2023-12-21 15:27:55,750 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 (31)] Waiting until timeout for monitored process [2023-12-21 15:27:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:27:55,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 15:27:55,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:56,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-21 15:27:56,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:27:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:27:56,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:56,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:27:56,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-12-21 15:27:56,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:27:56,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2023-12-21 15:27:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 15:27:57,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:57,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313580047] [2023-12-21 15:27:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313580047] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:57,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:57,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-12-21 15:27:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111072481] [2023-12-21 15:27:57,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 15:27:57,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 15:27:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:27:57,032 INFO L87 Difference]: Start difference. First operand 319 states and 428 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:57,823 INFO L93 Difference]: Finished difference Result 590 states and 786 transitions. [2023-12-21 15:27:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 15:27:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-12-21 15:27:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:57,825 INFO L225 Difference]: With dead ends: 590 [2023-12-21 15:27:57,825 INFO L226 Difference]: Without dead ends: 436 [2023-12-21 15:27:57,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-12-21 15:27:57,829 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:57,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 619 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:27:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-21 15:27:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 369. [2023-12-21 15:27:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 353 states have (on average 1.3257790368271956) internal successors, (468), 359 states have internal predecessors, (468), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 15:27:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 489 transitions. [2023-12-21 15:27:57,865 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 489 transitions. Word has length 44 [2023-12-21 15:27:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:57,865 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 489 transitions. [2023-12-21 15:27:57,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:27:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 489 transitions. [2023-12-21 15:27:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-21 15:27:57,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:57,866 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:57,882 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 (31)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:58,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /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 [2023-12-21 15:27:58,070 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:58,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1578597771, now seen corresponding path program 3 times [2023-12-21 15:27:58,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:58,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355775997] [2023-12-21 15:27:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:27:58,071 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 [2023-12-21 15:27:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:58,072 INFO L229 MonitoredProcess]: Starting monitored process 32 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) [2023-12-21 15:27:58,088 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 (32)] Waiting until timeout for monitored process [2023-12-21 15:27:58,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 15:27:58,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:58,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 15:27:58,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:27:58,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:27:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:27:58,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:27:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355775997] [2023-12-21 15:27:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355775997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:27:58,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:27:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-12-21 15:27:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778707281] [2023-12-21 15:27:58,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:27:58,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 15:27:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:27:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 15:27:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-12-21 15:27:58,597 INFO L87 Difference]: Start difference. First operand 369 states and 489 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:27:59,136 INFO L93 Difference]: Finished difference Result 522 states and 691 transitions. [2023-12-21 15:27:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 15:27:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2023-12-21 15:27:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:27:59,137 INFO L225 Difference]: With dead ends: 522 [2023-12-21 15:27:59,137 INFO L226 Difference]: Without dead ends: 513 [2023-12-21 15:27:59,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2023-12-21 15:27:59,138 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 282 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:27:59,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 466 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 15:27:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-12-21 15:27:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 352. [2023-12-21 15:27:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 336 states have (on average 1.3303571428571428) internal successors, (447), 342 states have internal predecessors, (447), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 15:27:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2023-12-21 15:27:59,174 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 44 [2023-12-21 15:27:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:27:59,174 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2023-12-21 15:27:59,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:27:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2023-12-21 15:27:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 15:27:59,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:27:59,175 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:27:59,182 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 (32)] Forceful destruction successful, exit code 0 [2023-12-21 15:27:59,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /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 [2023-12-21 15:27:59,379 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:27:59,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:27:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1793358459, now seen corresponding path program 2 times [2023-12-21 15:27:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:27:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471628805] [2023-12-21 15:27:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:27:59,379 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 [2023-12-21 15:27:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:27:59,380 INFO L229 MonitoredProcess]: Starting monitored process 33 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) [2023-12-21 15:27:59,413 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 (33)] Waiting until timeout for monitored process [2023-12-21 15:27:59,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:27:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:27:59,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 15:27:59,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:27:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:27:59,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:00,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471628805] [2023-12-21 15:28:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471628805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:00,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-12-21 15:28:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45247508] [2023-12-21 15:28:00,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 15:28:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 15:28:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-21 15:28:00,191 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:01,522 INFO L93 Difference]: Finished difference Result 676 states and 915 transitions. [2023-12-21 15:28:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 15:28:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-12-21 15:28:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:01,524 INFO L225 Difference]: With dead ends: 676 [2023-12-21 15:28:01,524 INFO L226 Difference]: Without dead ends: 663 [2023-12-21 15:28:01,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 15:28:01,525 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 395 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:01,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1169 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 15:28:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-12-21 15:28:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 365. [2023-12-21 15:28:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 349 states have (on average 1.335243553008596) internal successors, (466), 355 states have internal predecessors, (466), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 15:28:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 487 transitions. [2023-12-21 15:28:01,570 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 487 transitions. Word has length 45 [2023-12-21 15:28:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:01,570 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 487 transitions. [2023-12-21 15:28:01,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 487 transitions. [2023-12-21 15:28:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 15:28:01,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:01,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:01,576 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 (33)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /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 [2023-12-21 15:28:01,775 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:01,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1976068542, now seen corresponding path program 1 times [2023-12-21 15:28:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327487513] [2023-12-21 15:28:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:28:01,775 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 [2023-12-21 15:28:01,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:01,776 INFO L229 MonitoredProcess]: Starting monitored process 34 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) [2023-12-21 15:28:01,777 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 (34)] Waiting until timeout for monitored process [2023-12-21 15:28:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:28:01,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 15:28:01,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:28:01,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 15:28:01,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327487513] [2023-12-21 15:28:01,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327487513] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:01,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:01,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2023-12-21 15:28:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550623819] [2023-12-21 15:28:01,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 15:28:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 15:28:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-21 15:28:01,972 INFO L87 Difference]: Start difference. First operand 365 states and 487 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:28:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:02,167 INFO L93 Difference]: Finished difference Result 400 states and 535 transitions. [2023-12-21 15:28:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 15:28:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-12-21 15:28:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:02,169 INFO L225 Difference]: With dead ends: 400 [2023-12-21 15:28:02,169 INFO L226 Difference]: Without dead ends: 382 [2023-12-21 15:28:02,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-21 15:28:02,169 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:02,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 310 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 15:28:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-12-21 15:28:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2023-12-21 15:28:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 358 states have (on average 1.335195530726257) internal successors, (478), 365 states have internal predecessors, (478), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 15:28:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 501 transitions. [2023-12-21 15:28:02,214 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 501 transitions. Word has length 48 [2023-12-21 15:28:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 501 transitions. [2023-12-21 15:28:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:28:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 501 transitions. [2023-12-21 15:28:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 15:28:02,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:02,215 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:02,240 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 (34)] Ended with exit code 0 [2023-12-21 15:28:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /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 [2023-12-21 15:28:02,419 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:02,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:02,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1740399151, now seen corresponding path program 1 times [2023-12-21 15:28:02,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:02,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233763698] [2023-12-21 15:28:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:28:02,420 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 [2023-12-21 15:28:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:02,420 INFO L229 MonitoredProcess]: Starting monitored process 35 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) [2023-12-21 15:28:02,427 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 (35)] Waiting until timeout for monitored process [2023-12-21 15:28:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:28:02,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 15:28:02,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:28:02,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:02,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233763698] [2023-12-21 15:28:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233763698] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:02,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-12-21 15:28:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740503781] [2023-12-21 15:28:02,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:02,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 15:28:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 15:28:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-21 15:28:02,902 INFO L87 Difference]: Start difference. First operand 375 states and 501 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:03,710 INFO L93 Difference]: Finished difference Result 523 states and 701 transitions. [2023-12-21 15:28:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 15:28:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-12-21 15:28:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:03,711 INFO L225 Difference]: With dead ends: 523 [2023-12-21 15:28:03,711 INFO L226 Difference]: Without dead ends: 429 [2023-12-21 15:28:03,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2023-12-21 15:28:03,712 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 219 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:03,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 938 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:28:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-12-21 15:28:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 349. [2023-12-21 15:28:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 332 states have (on average 1.3283132530120483) internal successors, (441), 339 states have internal predecessors, (441), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 15:28:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 464 transitions. [2023-12-21 15:28:03,760 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 464 transitions. Word has length 47 [2023-12-21 15:28:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:03,760 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 464 transitions. [2023-12-21 15:28:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 464 transitions. [2023-12-21 15:28:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 15:28:03,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:03,761 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:03,768 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 (35)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /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 [2023-12-21 15:28:03,964 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:03,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -282012158, now seen corresponding path program 3 times [2023-12-21 15:28:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:03,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265205078] [2023-12-21 15:28:03,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:28:03,965 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 [2023-12-21 15:28:03,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:03,966 INFO L229 MonitoredProcess]: Starting monitored process 36 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) [2023-12-21 15:28:03,966 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 (36)] Waiting until timeout for monitored process [2023-12-21 15:28:04,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 15:28:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:04,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 15:28:04,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:04,144 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 15 treesize of output 1 [2023-12-21 15:28:04,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:28:04,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:28:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 15:28:04,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:04,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:04,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:28:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 15:28:05,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:05,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265205078] [2023-12-21 15:28:05,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265205078] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:05,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-12-21 15:28:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659014549] [2023-12-21 15:28:05,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:05,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 15:28:05,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 15:28:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-12-21 15:28:05,098 INFO L87 Difference]: Start difference. First operand 349 states and 464 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:06,102 INFO L93 Difference]: Finished difference Result 604 states and 818 transitions. [2023-12-21 15:28:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 15:28:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-12-21 15:28:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:06,104 INFO L225 Difference]: With dead ends: 604 [2023-12-21 15:28:06,104 INFO L226 Difference]: Without dead ends: 542 [2023-12-21 15:28:06,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-12-21 15:28:06,104 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 111 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:06,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 741 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 15:28:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-12-21 15:28:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 394. [2023-12-21 15:28:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 377 states have (on average 1.3448275862068966) internal successors, (507), 384 states have internal predecessors, (507), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 15:28:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 530 transitions. [2023-12-21 15:28:06,180 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 530 transitions. Word has length 48 [2023-12-21 15:28:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:06,180 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 530 transitions. [2023-12-21 15:28:06,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 530 transitions. [2023-12-21 15:28:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 15:28:06,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:06,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:06,202 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 (36)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:06,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /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 [2023-12-21 15:28:06,386 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:06,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash -183178363, now seen corresponding path program 2 times [2023-12-21 15:28:06,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:06,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624267083] [2023-12-21 15:28:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:28:06,386 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 [2023-12-21 15:28:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:06,392 INFO L229 MonitoredProcess]: Starting monitored process 37 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) [2023-12-21 15:28:06,400 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 (37)] Waiting until timeout for monitored process [2023-12-21 15:28:06,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:28:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:06,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 15:28:06,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:06,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:07,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624267083] [2023-12-21 15:28:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624267083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:07,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:07,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2023-12-21 15:28:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719631342] [2023-12-21 15:28:07,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 15:28:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 15:28:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 15:28:07,930 INFO L87 Difference]: Start difference. First operand 394 states and 530 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:10,333 INFO L93 Difference]: Finished difference Result 1015 states and 1386 transitions. [2023-12-21 15:28:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 15:28:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-12-21 15:28:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:10,335 INFO L225 Difference]: With dead ends: 1015 [2023-12-21 15:28:10,335 INFO L226 Difference]: Without dead ends: 889 [2023-12-21 15:28:10,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2023-12-21 15:28:10,336 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 834 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:10,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1882 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 15:28:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2023-12-21 15:28:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 502. [2023-12-21 15:28:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 488 states have (on average 1.3565573770491803) internal successors, (662), 493 states have internal predecessors, (662), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 681 transitions. [2023-12-21 15:28:10,475 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 681 transitions. Word has length 49 [2023-12-21 15:28:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 681 transitions. [2023-12-21 15:28:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 681 transitions. [2023-12-21 15:28:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:10,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:10,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:10,494 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 (37)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:10,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /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 [2023-12-21 15:28:10,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:10,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash 144461190, now seen corresponding path program 1 times [2023-12-21 15:28:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23545202] [2023-12-21 15:28:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:28:10,682 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 [2023-12-21 15:28:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:10,696 INFO L229 MonitoredProcess]: Starting monitored process 38 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) [2023-12-21 15:28:10,737 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 (38)] Waiting until timeout for monitored process [2023-12-21 15:28:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:28:10,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 15:28:10,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 15:28:10,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 15:28:10,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23545202] [2023-12-21 15:28:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23545202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 15:28:10,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 15:28:10,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-21 15:28:10,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785694526] [2023-12-21 15:28:10,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 15:28:10,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 15:28:10,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 15:28:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-21 15:28:10,959 INFO L87 Difference]: Start difference. First operand 502 states and 681 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 15:28:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:11,265 INFO L93 Difference]: Finished difference Result 552 states and 750 transitions. [2023-12-21 15:28:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 15:28:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2023-12-21 15:28:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:11,267 INFO L225 Difference]: With dead ends: 552 [2023-12-21 15:28:11,267 INFO L226 Difference]: Without dead ends: 523 [2023-12-21 15:28:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:28:11,268 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 196 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 15:28:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-12-21 15:28:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 505. [2023-12-21 15:28:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 491 states have (on average 1.354378818737271) internal successors, (665), 496 states have internal predecessors, (665), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 684 transitions. [2023-12-21 15:28:11,348 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 684 transitions. Word has length 52 [2023-12-21 15:28:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:11,348 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 684 transitions. [2023-12-21 15:28:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 15:28:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 684 transitions. [2023-12-21 15:28:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:11,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:11,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:11,354 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 (38)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:11,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /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 [2023-12-21 15:28:11,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:11,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1544482552, now seen corresponding path program 1 times [2023-12-21 15:28:11,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:11,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108861326] [2023-12-21 15:28:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:28:11,554 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 [2023-12-21 15:28:11,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:11,555 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2023-12-21 15:28:11,588 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 (39)] Waiting until timeout for monitored process [2023-12-21 15:28:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:28:11,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 15:28:11,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:28:11,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 15:28:11,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:11,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108861326] [2023-12-21 15:28:11,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108861326] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:11,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:11,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-12-21 15:28:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000081713] [2023-12-21 15:28:11,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:11,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 15:28:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 15:28:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-21 15:28:11,902 INFO L87 Difference]: Start difference. First operand 505 states and 684 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:28:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:12,261 INFO L93 Difference]: Finished difference Result 591 states and 793 transitions. [2023-12-21 15:28:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 15:28:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2023-12-21 15:28:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:12,263 INFO L225 Difference]: With dead ends: 591 [2023-12-21 15:28:12,263 INFO L226 Difference]: Without dead ends: 529 [2023-12-21 15:28:12,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:28:12,263 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:12,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 401 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 15:28:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-12-21 15:28:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 506. [2023-12-21 15:28:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 492 states have (on average 1.3516260162601625) internal successors, (665), 497 states have internal predecessors, (665), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 684 transitions. [2023-12-21 15:28:12,331 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 684 transitions. Word has length 52 [2023-12-21 15:28:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 684 transitions. [2023-12-21 15:28:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:28:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 684 transitions. [2023-12-21 15:28:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 15:28:12,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:12,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:12,336 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 (39)] Ended with exit code 0 [2023-12-21 15:28:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /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 [2023-12-21 15:28:12,536 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -235455997, now seen corresponding path program 2 times [2023-12-21 15:28:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302691581] [2023-12-21 15:28:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:28:12,537 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 [2023-12-21 15:28:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:12,538 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2023-12-21 15:28:12,539 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 (40)] Waiting until timeout for monitored process [2023-12-21 15:28:12,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:28:12,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:12,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 15:28:12,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 15:28:12,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 15:28:12,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302691581] [2023-12-21 15:28:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302691581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:12,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:12,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-12-21 15:28:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34099165] [2023-12-21 15:28:12,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:12,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 15:28:12,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 15:28:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-21 15:28:12,795 INFO L87 Difference]: Start difference. First operand 506 states and 684 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:28:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:13,083 INFO L93 Difference]: Finished difference Result 552 states and 743 transitions. [2023-12-21 15:28:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 15:28:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2023-12-21 15:28:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:13,085 INFO L225 Difference]: With dead ends: 552 [2023-12-21 15:28:13,085 INFO L226 Difference]: Without dead ends: 495 [2023-12-21 15:28:13,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-12-21 15:28:13,086 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:13,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 344 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 15:28:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-12-21 15:28:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2023-12-21 15:28:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 481 states have (on average 1.3534303534303533) internal successors, (651), 486 states have internal predecessors, (651), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 670 transitions. [2023-12-21 15:28:13,153 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 670 transitions. Word has length 53 [2023-12-21 15:28:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:13,153 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 670 transitions. [2023-12-21 15:28:13,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:28:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 670 transitions. [2023-12-21 15:28:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-21 15:28:13,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:13,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:13,160 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 (40)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /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 [2023-12-21 15:28:13,358 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:13,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1187589540, now seen corresponding path program 4 times [2023-12-21 15:28:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828218123] [2023-12-21 15:28:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 15:28:13,359 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 [2023-12-21 15:28:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:13,360 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2023-12-21 15:28:13,361 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 (41)] Waiting until timeout for monitored process [2023-12-21 15:28:13,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 15:28:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:13,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 15:28:13,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:13,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:14,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828218123] [2023-12-21 15:28:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828218123] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:14,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:14,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-12-21 15:28:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808183606] [2023-12-21 15:28:14,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:14,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 15:28:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 15:28:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2023-12-21 15:28:14,562 INFO L87 Difference]: Start difference. First operand 495 states and 670 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:16,070 INFO L93 Difference]: Finished difference Result 829 states and 1111 transitions. [2023-12-21 15:28:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-21 15:28:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-12-21 15:28:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:16,072 INFO L225 Difference]: With dead ends: 829 [2023-12-21 15:28:16,072 INFO L226 Difference]: Without dead ends: 778 [2023-12-21 15:28:16,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=504, Invalid=1946, Unknown=0, NotChecked=0, Total=2450 [2023-12-21 15:28:16,073 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 460 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 927 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 15:28:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-12-21 15:28:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 512. [2023-12-21 15:28:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 498 states have (on average 1.3614457831325302) internal successors, (678), 503 states have internal predecessors, (678), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 697 transitions. [2023-12-21 15:28:16,149 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 697 transitions. Word has length 51 [2023-12-21 15:28:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:16,150 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 697 transitions. [2023-12-21 15:28:16,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 697 transitions. [2023-12-21 15:28:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-21 15:28:16,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:16,151 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:16,161 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 (41)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:16,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /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 [2023-12-21 15:28:16,355 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:16,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1512909672, now seen corresponding path program 1 times [2023-12-21 15:28:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215531937] [2023-12-21 15:28:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:28:16,356 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 [2023-12-21 15:28:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:16,357 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2023-12-21 15:28:16,359 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 (42)] Waiting until timeout for monitored process [2023-12-21 15:28:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:28:16,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 15:28:16,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:28:16,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 15:28:17,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:17,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215531937] [2023-12-21 15:28:17,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215531937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:17,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:17,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-12-21 15:28:17,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758822144] [2023-12-21 15:28:17,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:17,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 15:28:17,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 15:28:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-12-21 15:28:17,039 INFO L87 Difference]: Start difference. First operand 512 states and 697 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:17,959 INFO L93 Difference]: Finished difference Result 960 states and 1289 transitions. [2023-12-21 15:28:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 15:28:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-12-21 15:28:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:17,961 INFO L225 Difference]: With dead ends: 960 [2023-12-21 15:28:17,961 INFO L226 Difference]: Without dead ends: 670 [2023-12-21 15:28:17,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 15:28:17,961 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 219 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:17,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1081 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:28:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-12-21 15:28:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 456. [2023-12-21 15:28:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 442 states have (on average 1.3461538461538463) internal successors, (595), 447 states have internal predecessors, (595), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2023-12-21 15:28:18,027 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 51 [2023-12-21 15:28:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:18,028 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2023-12-21 15:28:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:28:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2023-12-21 15:28:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:18,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:18,029 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:18,032 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 (42)] Ended with exit code 0 [2023-12-21 15:28:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /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 [2023-12-21 15:28:18,232 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:18,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash -697984437, now seen corresponding path program 2 times [2023-12-21 15:28:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:18,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204061213] [2023-12-21 15:28:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:28:18,233 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 [2023-12-21 15:28:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:18,234 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2023-12-21 15:28:18,235 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 (43)] Waiting until timeout for monitored process [2023-12-21 15:28:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:28:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:18,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 15:28:18,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:28:18,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 15:28:18,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204061213] [2023-12-21 15:28:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204061213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:18,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-12-21 15:28:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642440094] [2023-12-21 15:28:18,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 15:28:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 15:28:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-12-21 15:28:18,594 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand has 20 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:19,145 INFO L93 Difference]: Finished difference Result 675 states and 923 transitions. [2023-12-21 15:28:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 15:28:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-12-21 15:28:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:19,147 INFO L225 Difference]: With dead ends: 675 [2023-12-21 15:28:19,147 INFO L226 Difference]: Without dead ends: 615 [2023-12-21 15:28:19,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2023-12-21 15:28:19,148 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 174 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:19,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 988 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:28:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-12-21 15:28:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 600. [2023-12-21 15:28:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 586 states have (on average 1.3430034129692834) internal successors, (787), 591 states have internal predecessors, (787), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 806 transitions. [2023-12-21 15:28:19,241 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 806 transitions. Word has length 52 [2023-12-21 15:28:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:19,241 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 806 transitions. [2023-12-21 15:28:19,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 806 transitions. [2023-12-21 15:28:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 15:28:19,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:19,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:19,264 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 (43)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /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 [2023-12-21 15:28:19,448 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:19,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2033646212, now seen corresponding path program 3 times [2023-12-21 15:28:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324024033] [2023-12-21 15:28:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:28:19,449 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 [2023-12-21 15:28:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:19,449 INFO L229 MonitoredProcess]: Starting monitored process 44 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) [2023-12-21 15:28:19,464 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 (44)] Waiting until timeout for monitored process [2023-12-21 15:28:19,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 15:28:19,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:19,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 15:28:19,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 15:28:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 15:28:20,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:20,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324024033] [2023-12-21 15:28:20,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324024033] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:20,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:20,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2023-12-21 15:28:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632250025] [2023-12-21 15:28:20,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:20,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 15:28:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 15:28:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-12-21 15:28:20,263 INFO L87 Difference]: Start difference. First operand 600 states and 806 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 15:28:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:21,536 INFO L93 Difference]: Finished difference Result 923 states and 1229 transitions. [2023-12-21 15:28:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 15:28:21,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2023-12-21 15:28:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:21,539 INFO L225 Difference]: With dead ends: 923 [2023-12-21 15:28:21,539 INFO L226 Difference]: Without dead ends: 835 [2023-12-21 15:28:21,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 15:28:21,540 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 390 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:21,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 594 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 15:28:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-12-21 15:28:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 602. [2023-12-21 15:28:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 588 states have (on average 1.3299319727891157) internal successors, (782), 593 states have internal predecessors, (782), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 801 transitions. [2023-12-21 15:28:21,635 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 801 transitions. Word has length 54 [2023-12-21 15:28:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:21,636 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 801 transitions. [2023-12-21 15:28:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 15:28:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 801 transitions. [2023-12-21 15:28:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:21,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:21,637 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:21,640 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 (44)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:21,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /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 [2023-12-21 15:28:21,840 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:21,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1522345468, now seen corresponding path program 3 times [2023-12-21 15:28:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:21,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945237019] [2023-12-21 15:28:21,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:28:21,841 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 [2023-12-21 15:28:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:21,842 INFO L229 MonitoredProcess]: Starting monitored process 45 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) [2023-12-21 15:28:21,875 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 (45)] Waiting until timeout for monitored process [2023-12-21 15:28:21,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 15:28:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:21,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 15:28:21,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:22,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 15:28:22,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:28:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 15:28:22,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:22,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:22,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 15:28:22,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:22,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-12-21 15:28:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 15:28:22,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945237019] [2023-12-21 15:28:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945237019] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:22,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:22,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-12-21 15:28:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169993297] [2023-12-21 15:28:22,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 15:28:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 15:28:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-21 15:28:22,410 INFO L87 Difference]: Start difference. First operand 602 states and 801 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:22,950 INFO L93 Difference]: Finished difference Result 1118 states and 1492 transitions. [2023-12-21 15:28:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 15:28:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-12-21 15:28:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:22,953 INFO L225 Difference]: With dead ends: 1118 [2023-12-21 15:28:22,953 INFO L226 Difference]: Without dead ends: 883 [2023-12-21 15:28:22,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:28:22,956 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 124 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:22,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 422 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:28:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-12-21 15:28:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 606. [2023-12-21 15:28:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 592 states have (on average 1.322635135135135) internal successors, (783), 597 states have internal predecessors, (783), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 802 transitions. [2023-12-21 15:28:23,060 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 802 transitions. Word has length 52 [2023-12-21 15:28:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:23,060 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 802 transitions. [2023-12-21 15:28:23,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 802 transitions. [2023-12-21 15:28:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:23,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:23,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:23,080 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 (45)] Ended with exit code 0 [2023-12-21 15:28:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /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 [2023-12-21 15:28:23,266 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:23,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash -15683648, now seen corresponding path program 4 times [2023-12-21 15:28:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:23,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133143623] [2023-12-21 15:28:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 15:28:23,266 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 [2023-12-21 15:28:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:23,269 INFO L229 MonitoredProcess]: Starting monitored process 46 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) [2023-12-21 15:28:23,270 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 (46)] Waiting until timeout for monitored process [2023-12-21 15:28:23,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 15:28:23,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:23,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 15:28:23,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:23,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:28:23,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:28:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 15:28:23,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:24,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:24,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:28:24,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:24,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:28:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 15:28:24,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:24,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133143623] [2023-12-21 15:28:24,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133143623] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:24,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:24,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2023-12-21 15:28:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219893703] [2023-12-21 15:28:24,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:24,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 15:28:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 15:28:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-12-21 15:28:24,936 INFO L87 Difference]: Start difference. First operand 606 states and 802 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:28:26,076 INFO L93 Difference]: Finished difference Result 1139 states and 1505 transitions. [2023-12-21 15:28:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 15:28:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-12-21 15:28:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:28:26,078 INFO L225 Difference]: With dead ends: 1139 [2023-12-21 15:28:26,078 INFO L226 Difference]: Without dead ends: 854 [2023-12-21 15:28:26,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-12-21 15:28:26,079 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 86 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 15:28:26,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 935 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 15:28:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-12-21 15:28:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 627. [2023-12-21 15:28:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 613 states have (on average 1.3132137030995106) internal successors, (805), 618 states have internal predecessors, (805), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:28:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 824 transitions. [2023-12-21 15:28:26,193 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 824 transitions. Word has length 52 [2023-12-21 15:28:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:28:26,193 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 824 transitions. [2023-12-21 15:28:26,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:28:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 824 transitions. [2023-12-21 15:28:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:28:26,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:28:26,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:28:26,200 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 (46)] Forceful destruction successful, exit code 0 [2023-12-21 15:28:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /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 [2023-12-21 15:28:26,399 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:28:26,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:28:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1166175832, now seen corresponding path program 5 times [2023-12-21 15:28:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:28:26,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431628738] [2023-12-21 15:28:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 15:28:26,399 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 [2023-12-21 15:28:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:28:26,400 INFO L229 MonitoredProcess]: Starting monitored process 47 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) [2023-12-21 15:28:26,401 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 (47)] Waiting until timeout for monitored process [2023-12-21 15:28:26,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 15:28:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:28:26,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 15:28:26,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:28:26,652 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 19 treesize of output 1 [2023-12-21 15:28:27,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-21 15:28:27,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:28:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 15:28:27,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:28:28,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:28:28,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:28:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 15:28:29,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:28:29,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431628738] [2023-12-21 15:28:29,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431628738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:28:29,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:28:29,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 40 [2023-12-21 15:28:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551650139] [2023-12-21 15:28:29,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:28:29,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 15:28:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:28:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 15:28:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 15:28:29,923 INFO L87 Difference]: Start difference. First operand 627 states and 824 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:29:41,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 15:29:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:29:44,893 INFO L93 Difference]: Finished difference Result 1985 states and 2628 transitions. [2023-12-21 15:29:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-21 15:29:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-12-21 15:29:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:29:44,898 INFO L225 Difference]: With dead ends: 1985 [2023-12-21 15:29:44,898 INFO L226 Difference]: Without dead ends: 1654 [2023-12-21 15:29:44,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=1043, Invalid=7315, Unknown=14, NotChecked=0, Total=8372 [2023-12-21 15:29:44,901 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 635 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:29:44,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1728 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2768 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2023-12-21 15:29:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2023-12-21 15:29:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 921. [2023-12-21 15:29:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 907 states have (on average 1.2811466372657112) internal successors, (1162), 912 states have internal predecessors, (1162), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:29:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1181 transitions. [2023-12-21 15:29:45,099 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1181 transitions. Word has length 52 [2023-12-21 15:29:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:29:45,099 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1181 transitions. [2023-12-21 15:29:45,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:29:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1181 transitions. [2023-12-21 15:29:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 15:29:45,100 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:29:45,100 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:29:45,104 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 (47)] Ended with exit code 0 [2023-12-21 15:29:45,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /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 [2023-12-21 15:29:45,304 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:29:45,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:29:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2119795549, now seen corresponding path program 5 times [2023-12-21 15:29:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:29:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039035355] [2023-12-21 15:29:45,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 15:29:45,305 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 [2023-12-21 15:29:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:29:45,306 INFO L229 MonitoredProcess]: Starting monitored process 48 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) [2023-12-21 15:29:45,307 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 (48)] Waiting until timeout for monitored process [2023-12-21 15:29:45,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 15:29:45,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:29:45,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 15:29:45,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:29:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 15:29:45,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:29:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 15:29:46,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:29:46,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039035355] [2023-12-21 15:29:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039035355] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:29:46,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:29:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-12-21 15:29:46,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612161699] [2023-12-21 15:29:46,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:29:46,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 15:29:46,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:29:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 15:29:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2023-12-21 15:29:46,464 INFO L87 Difference]: Start difference. First operand 921 states and 1181 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:29:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:29:48,295 INFO L93 Difference]: Finished difference Result 1218 states and 1542 transitions. [2023-12-21 15:29:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 15:29:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-12-21 15:29:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:29:48,299 INFO L225 Difference]: With dead ends: 1218 [2023-12-21 15:29:48,299 INFO L226 Difference]: Without dead ends: 1020 [2023-12-21 15:29:48,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2023-12-21 15:29:48,300 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 222 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:29:48,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 644 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 15:29:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2023-12-21 15:29:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 880. [2023-12-21 15:29:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 866 states have (on average 1.2678983833718245) internal successors, (1098), 871 states have internal predecessors, (1098), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:29:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1117 transitions. [2023-12-21 15:29:48,490 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1117 transitions. Word has length 52 [2023-12-21 15:29:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:29:48,490 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1117 transitions. [2023-12-21 15:29:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:29:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1117 transitions. [2023-12-21 15:29:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 15:29:48,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:29:48,491 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:29:48,498 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 (48)] Forceful destruction successful, exit code 0 [2023-12-21 15:29:48,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /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 [2023-12-21 15:29:48,692 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:29:48,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:29:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash -310155856, now seen corresponding path program 6 times [2023-12-21 15:29:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:29:48,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699746083] [2023-12-21 15:29:48,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 15:29:48,693 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 [2023-12-21 15:29:48,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:29:48,694 INFO L229 MonitoredProcess]: Starting monitored process 49 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) [2023-12-21 15:29:48,695 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 (49)] Waiting until timeout for monitored process [2023-12-21 15:29:48,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-21 15:29:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:29:48,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 15:29:48,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:29:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 15:29:49,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:29:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 15:29:49,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:29:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699746083] [2023-12-21 15:29:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699746083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:29:49,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:29:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2023-12-21 15:29:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928717315] [2023-12-21 15:29:49,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:29:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 15:29:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:29:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 15:29:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2023-12-21 15:29:49,872 INFO L87 Difference]: Start difference. First operand 880 states and 1117 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:29:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:29:52,953 INFO L93 Difference]: Finished difference Result 1906 states and 2462 transitions. [2023-12-21 15:29:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 15:29:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-12-21 15:29:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:29:52,958 INFO L225 Difference]: With dead ends: 1906 [2023-12-21 15:29:52,958 INFO L226 Difference]: Without dead ends: 1784 [2023-12-21 15:29:52,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2023-12-21 15:29:52,960 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 317 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 15:29:52,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 2624 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 15:29:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2023-12-21 15:29:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1228. [2023-12-21 15:29:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1214 states have (on average 1.28500823723229) internal successors, (1560), 1219 states have internal predecessors, (1560), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 15:29:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1579 transitions. [2023-12-21 15:29:53,263 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1579 transitions. Word has length 53 [2023-12-21 15:29:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:29:53,264 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1579 transitions. [2023-12-21 15:29:53,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:29:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1579 transitions. [2023-12-21 15:29:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 15:29:53,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:29:53,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:29:53,270 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 (49)] Forceful destruction successful, exit code 0 [2023-12-21 15:29:53,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /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 [2023-12-21 15:29:53,468 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:29:53,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:29:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1153003592, now seen corresponding path program 4 times [2023-12-21 15:29:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:29:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51666521] [2023-12-21 15:29:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 15:29:53,469 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 [2023-12-21 15:29:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:29:53,469 INFO L229 MonitoredProcess]: Starting monitored process 50 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) [2023-12-21 15:29:53,470 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 (50)] Waiting until timeout for monitored process [2023-12-21 15:29:53,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 15:29:53,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:29:53,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 15:29:53,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:29:57,825 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) (_ bv0 32)) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) (_ bv0 32)))) is different from true [2023-12-21 15:29:58,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 15:29:58,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:29:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 15:29:58,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:29:58,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:29:58,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 15:29:58,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:29:58,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-12-21 15:29:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 15:29:59,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:29:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51666521] [2023-12-21 15:29:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51666521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:29:59,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:29:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2023-12-21 15:29:59,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158017869] [2023-12-21 15:29:59,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:29:59,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 15:29:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:29:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 15:29:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2023-12-21 15:29:59,017 INFO L87 Difference]: Start difference. First operand 1228 states and 1579 transitions. Second operand has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-21 15:30:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:30:00,874 INFO L93 Difference]: Finished difference Result 1764 states and 2280 transitions. [2023-12-21 15:30:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 15:30:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2023-12-21 15:30:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:30:00,879 INFO L225 Difference]: With dead ends: 1764 [2023-12-21 15:30:00,879 INFO L226 Difference]: Without dead ends: 1740 [2023-12-21 15:30:00,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=94, Invalid=371, Unknown=1, NotChecked=40, Total=506 [2023-12-21 15:30:00,880 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 104 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:30:00,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 491 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 178 Unchecked, 1.1s Time] [2023-12-21 15:30:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2023-12-21 15:30:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1257. [2023-12-21 15:30:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1239 states have (on average 1.2808716707021792) internal successors, (1587), 1245 states have internal predecessors, (1587), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 15:30:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1612 transitions. [2023-12-21 15:30:01,164 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1612 transitions. Word has length 57 [2023-12-21 15:30:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:30:01,164 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1612 transitions. [2023-12-21 15:30:01,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-21 15:30:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1612 transitions. [2023-12-21 15:30:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-21 15:30:01,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:30:01,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:30:01,170 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 (50)] Forceful destruction successful, exit code 0 [2023-12-21 15:30:01,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /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 [2023-12-21 15:30:01,370 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:30:01,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:30:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -852550094, now seen corresponding path program 1 times [2023-12-21 15:30:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:30:01,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4571278] [2023-12-21 15:30:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:30:01,371 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 [2023-12-21 15:30:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:30:01,374 INFO L229 MonitoredProcess]: Starting monitored process 51 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) [2023-12-21 15:30:01,375 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 (51)] Waiting until timeout for monitored process [2023-12-21 15:30:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:30:01,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 15:30:01,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:30:06,271 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_3| (_ BitVec 32)) (|v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_3| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| (_ BitVec 32))) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3|) (_ bv0 32)) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_3|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_3|)))) is different from true [2023-12-21 15:30:10,505 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| (_ BitVec 32))) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (_ bv0 32)) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_4|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_4|)))) is different from true [2023-12-21 15:30:10,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 15:30:10,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:30:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 2 not checked. [2023-12-21 15:30:10,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:30:11,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:11,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-12-21 15:30:11,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:11,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2023-12-21 15:30:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 15:30:12,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:30:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4571278] [2023-12-21 15:30:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4571278] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:30:12,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:30:12,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-12-21 15:30:12,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655883763] [2023-12-21 15:30:12,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:30:12,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 15:30:12,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:30:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 15:30:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=520, Unknown=2, NotChecked=94, Total=702 [2023-12-21 15:30:12,589 INFO L87 Difference]: Start difference. First operand 1257 states and 1612 transitions. Second operand has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 15:30:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:30:28,424 INFO L93 Difference]: Finished difference Result 1773 states and 2290 transitions. [2023-12-21 15:30:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 15:30:28,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2023-12-21 15:30:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:30:28,429 INFO L225 Difference]: With dead ends: 1773 [2023-12-21 15:30:28,429 INFO L226 Difference]: Without dead ends: 1771 [2023-12-21 15:30:28,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=140, Invalid=855, Unknown=5, NotChecked=122, Total=1122 [2023-12-21 15:30:28,429 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 157 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:30:28,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1055 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 701 Invalid, 0 Unknown, 462 Unchecked, 2.6s Time] [2023-12-21 15:30:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-12-21 15:30:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1272. [2023-12-21 15:30:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1250 states have (on average 1.2808) internal successors, (1601), 1257 states have internal predecessors, (1601), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 15:30:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1630 transitions. [2023-12-21 15:30:28,720 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1630 transitions. Word has length 58 [2023-12-21 15:30:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:30:28,720 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1630 transitions. [2023-12-21 15:30:28,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 15:30:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1630 transitions. [2023-12-21 15:30:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-21 15:30:28,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:30:28,721 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:30:28,726 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 (51)] Ended with exit code 0 [2023-12-21 15:30:28,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /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 [2023-12-21 15:30:28,926 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:30:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:30:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1790845613, now seen corresponding path program 7 times [2023-12-21 15:30:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:30:28,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109568545] [2023-12-21 15:30:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 15:30:28,926 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 [2023-12-21 15:30:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:30:28,927 INFO L229 MonitoredProcess]: Starting monitored process 52 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) [2023-12-21 15:30:28,928 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 (52)] Waiting until timeout for monitored process [2023-12-21 15:30:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:30:29,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 15:30:29,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:30:30,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:30:30,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:30:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 15:30:30,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:30:31,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:31,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:30:31,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:31,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:30:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:30:32,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:30:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109568545] [2023-12-21 15:30:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109568545] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:30:32,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:30:32,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-12-21 15:30:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582705694] [2023-12-21 15:30:32,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:30:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 15:30:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:30:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 15:30:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-12-21 15:30:32,775 INFO L87 Difference]: Start difference. First operand 1272 states and 1630 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:30:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:30:36,413 INFO L93 Difference]: Finished difference Result 1943 states and 2533 transitions. [2023-12-21 15:30:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 15:30:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-12-21 15:30:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:30:36,418 INFO L225 Difference]: With dead ends: 1943 [2023-12-21 15:30:36,418 INFO L226 Difference]: Without dead ends: 1672 [2023-12-21 15:30:36,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2023-12-21 15:30:36,420 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 103 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-21 15:30:36,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1025 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-21 15:30:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-12-21 15:30:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1341. [2023-12-21 15:30:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1319 states have (on average 1.2820318423047763) internal successors, (1691), 1326 states have internal predecessors, (1691), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 15:30:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1720 transitions. [2023-12-21 15:30:36,722 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1720 transitions. Word has length 56 [2023-12-21 15:30:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:30:36,722 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 1720 transitions. [2023-12-21 15:30:36,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:30:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1720 transitions. [2023-12-21 15:30:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 15:30:36,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:30:36,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:30:36,729 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 (52)] Ended with exit code 0 [2023-12-21 15:30:36,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /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 [2023-12-21 15:30:36,929 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:30:36,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:30:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 76120960, now seen corresponding path program 6 times [2023-12-21 15:30:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:30:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097275215] [2023-12-21 15:30:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 15:30:36,930 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 [2023-12-21 15:30:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:30:36,931 INFO L229 MonitoredProcess]: Starting monitored process 53 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) [2023-12-21 15:30:36,967 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 (53)] Waiting until timeout for monitored process [2023-12-21 15:30:37,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-12-21 15:30:37,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:30:37,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 15:30:37,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:30:38,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 15:30:38,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:30:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 15:30:38,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:30:38,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:38,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:30:38,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:30:38,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:30:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 15:30:39,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:30:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097275215] [2023-12-21 15:30:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097275215] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:30:39,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:30:39,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-21 15:30:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321416436] [2023-12-21 15:30:39,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:30:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 15:30:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:30:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 15:30:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:30:39,483 INFO L87 Difference]: Start difference. First operand 1341 states and 1720 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:30:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:30:41,884 INFO L93 Difference]: Finished difference Result 1919 states and 2496 transitions. [2023-12-21 15:30:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 15:30:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2023-12-21 15:30:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:30:41,900 INFO L225 Difference]: With dead ends: 1919 [2023-12-21 15:30:41,900 INFO L226 Difference]: Without dead ends: 1662 [2023-12-21 15:30:41,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-12-21 15:30:41,901 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 104 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:30:41,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 617 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-21 15:30:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2023-12-21 15:30:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1342. [2023-12-21 15:30:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1320 states have (on average 1.2765151515151516) internal successors, (1685), 1327 states have internal predecessors, (1685), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 15:30:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1714 transitions. [2023-12-21 15:30:42,227 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1714 transitions. Word has length 57 [2023-12-21 15:30:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:30:42,228 INFO L495 AbstractCegarLoop]: Abstraction has 1342 states and 1714 transitions. [2023-12-21 15:30:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:30:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1714 transitions. [2023-12-21 15:30:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 15:30:42,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:30:42,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:30:42,233 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 (53)] Forceful destruction successful, exit code 0 [2023-12-21 15:30:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /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 [2023-12-21 15:30:42,433 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:30:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:30:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -345771972, now seen corresponding path program 7 times [2023-12-21 15:30:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:30:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335078358] [2023-12-21 15:30:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 15:30:42,433 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 [2023-12-21 15:30:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:30:42,434 INFO L229 MonitoredProcess]: Starting monitored process 54 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) [2023-12-21 15:30:42,435 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 (54)] Waiting until timeout for monitored process [2023-12-21 15:30:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:30:42,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 15:30:42,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:30:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:30:44,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:30:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:30:47,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:30:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335078358] [2023-12-21 15:30:47,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335078358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:30:47,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:30:47,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2023-12-21 15:30:47,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599325134] [2023-12-21 15:30:47,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:30:47,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 15:30:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:30:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 15:30:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 15:30:47,903 INFO L87 Difference]: Start difference. First operand 1342 states and 1714 transitions. Second operand has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:30:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:30:57,526 INFO L93 Difference]: Finished difference Result 2405 states and 3062 transitions. [2023-12-21 15:30:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-21 15:30:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2023-12-21 15:30:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:30:57,530 INFO L225 Difference]: With dead ends: 2405 [2023-12-21 15:30:57,530 INFO L226 Difference]: Without dead ends: 2392 [2023-12-21 15:30:57,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2023-12-21 15:30:57,531 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 573 mSDsluCounter, 2055 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:30:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2174 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-21 15:30:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2023-12-21 15:30:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 1357. [2023-12-21 15:30:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1335 states have (on average 1.2771535580524345) internal successors, (1705), 1342 states have internal predecessors, (1705), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 15:30:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 1734 transitions. [2023-12-21 15:30:57,868 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 1734 transitions. Word has length 57 [2023-12-21 15:30:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:30:57,869 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 1734 transitions. [2023-12-21 15:30:57,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:30:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 1734 transitions. [2023-12-21 15:30:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 15:30:57,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:30:57,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:30:57,876 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 (54)] Ended with exit code 0 [2023-12-21 15:30:58,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /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 [2023-12-21 15:30:58,076 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:30:58,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:30:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 849705831, now seen corresponding path program 8 times [2023-12-21 15:30:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:30:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500564364] [2023-12-21 15:30:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:30:58,076 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 [2023-12-21 15:30:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:30:58,077 INFO L229 MonitoredProcess]: Starting monitored process 55 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) [2023-12-21 15:30:58,081 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 (55)] Waiting until timeout for monitored process [2023-12-21 15:30:58,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:30:58,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:30:58,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 15:30:58,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:30:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 15:30:59,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:31:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 15:31:02,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:31:02,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500564364] [2023-12-21 15:31:02,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500564364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:31:02,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:31:02,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2023-12-21 15:31:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556274452] [2023-12-21 15:31:02,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:31:02,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 15:31:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:31:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 15:31:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2023-12-21 15:31:02,628 INFO L87 Difference]: Start difference. First operand 1357 states and 1734 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:31:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:31:13,341 INFO L93 Difference]: Finished difference Result 2571 states and 3282 transitions. [2023-12-21 15:31:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-21 15:31:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2023-12-21 15:31:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:31:13,345 INFO L225 Difference]: With dead ends: 2571 [2023-12-21 15:31:13,345 INFO L226 Difference]: Without dead ends: 2013 [2023-12-21 15:31:13,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=627, Invalid=2129, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 15:31:13,346 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 539 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-21 15:31:13,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1534 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-21 15:31:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2023-12-21 15:31:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1312. [2023-12-21 15:31:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1290 states have (on average 1.2635658914728682) internal successors, (1630), 1297 states have internal predecessors, (1630), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 15:31:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1659 transitions. [2023-12-21 15:31:13,682 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1659 transitions. Word has length 59 [2023-12-21 15:31:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:31:13,683 INFO L495 AbstractCegarLoop]: Abstraction has 1312 states and 1659 transitions. [2023-12-21 15:31:13,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:31:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1659 transitions. [2023-12-21 15:31:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-21 15:31:13,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:31:13,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:31:13,700 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 (55)] Ended with exit code 0 [2023-12-21 15:31:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /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 [2023-12-21 15:31:13,889 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:31:13,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:31:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315874, now seen corresponding path program 1 times [2023-12-21 15:31:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:31:13,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949566109] [2023-12-21 15:31:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:31:13,890 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 [2023-12-21 15:31:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:31:13,891 INFO L229 MonitoredProcess]: Starting monitored process 56 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) [2023-12-21 15:31:13,892 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 (56)] Waiting until timeout for monitored process [2023-12-21 15:31:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:31:14,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 15:31:14,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:31:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 15:31:14,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:31:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 15:31:14,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:31:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949566109] [2023-12-21 15:31:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949566109] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:31:14,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:31:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-21 15:31:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002533831] [2023-12-21 15:31:14,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:31:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 15:31:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:31:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 15:31:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 15:31:14,238 INFO L87 Difference]: Start difference. First operand 1312 states and 1659 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 15:31:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:31:14,994 INFO L93 Difference]: Finished difference Result 1348 states and 1706 transitions. [2023-12-21 15:31:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 15:31:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2023-12-21 15:31:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:31:14,996 INFO L225 Difference]: With dead ends: 1348 [2023-12-21 15:31:14,996 INFO L226 Difference]: Without dead ends: 1319 [2023-12-21 15:31:14,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-21 15:31:15,010 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 15:31:15,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 347 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 15:31:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-12-21 15:31:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1315. [2023-12-21 15:31:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1292 states have (on average 1.2600619195046439) internal successors, (1628), 1297 states have internal predecessors, (1628), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 15:31:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1659 transitions. [2023-12-21 15:31:15,364 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1659 transitions. Word has length 62 [2023-12-21 15:31:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:31:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 1659 transitions. [2023-12-21 15:31:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 15:31:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1659 transitions. [2023-12-21 15:31:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 15:31:15,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:31:15,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:31:15,372 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 (56)] Forceful destruction successful, exit code 0 [2023-12-21 15:31:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /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 [2023-12-21 15:31:15,571 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:31:15,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:31:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1875717659, now seen corresponding path program 8 times [2023-12-21 15:31:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:31:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96106379] [2023-12-21 15:31:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:31:15,571 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 [2023-12-21 15:31:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:31:15,572 INFO L229 MonitoredProcess]: Starting monitored process 57 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) [2023-12-21 15:31:15,575 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 (57)] Waiting until timeout for monitored process [2023-12-21 15:31:15,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:31:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:31:15,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 15:31:15,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:31:18,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:31:18,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:31:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 15:31:18,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:31:20,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:31:20,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:31:20,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:31:20,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:31:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 15:31:23,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:31:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96106379] [2023-12-21 15:31:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96106379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:31:23,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:31:23,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 42 [2023-12-21 15:31:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002449573] [2023-12-21 15:31:23,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:31:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-21 15:31:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:31:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-21 15:31:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 15:31:23,317 INFO L87 Difference]: Start difference. First operand 1315 states and 1659 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:31:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:31:48,855 INFO L93 Difference]: Finished difference Result 2219 states and 2812 transitions. [2023-12-21 15:31:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-21 15:31:48,856 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2023-12-21 15:31:48,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:31:48,858 INFO L225 Difference]: With dead ends: 2219 [2023-12-21 15:31:48,858 INFO L226 Difference]: Without dead ends: 2031 [2023-12-21 15:31:48,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=928, Invalid=8384, Unknown=0, NotChecked=0, Total=9312 [2023-12-21 15:31:48,859 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 398 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:31:48,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 2018 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-12-21 15:31:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2023-12-21 15:31:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1361. [2023-12-21 15:31:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1338 states have (on average 1.2668161434977578) internal successors, (1695), 1343 states have internal predecessors, (1695), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 15:31:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1726 transitions. [2023-12-21 15:31:49,201 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1726 transitions. Word has length 60 [2023-12-21 15:31:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:31:49,201 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1726 transitions. [2023-12-21 15:31:49,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:31:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1726 transitions. [2023-12-21 15:31:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 15:31:49,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:31:49,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:31:49,208 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 (57)] Forceful destruction successful, exit code 0 [2023-12-21 15:31:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /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 [2023-12-21 15:31:49,408 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:31:49,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:31:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1525601035, now seen corresponding path program 9 times [2023-12-21 15:31:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:31:49,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098790476] [2023-12-21 15:31:49,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:31:49,408 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 [2023-12-21 15:31:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:31:49,409 INFO L229 MonitoredProcess]: Starting monitored process 58 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) [2023-12-21 15:31:49,456 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 (58)] Waiting until timeout for monitored process [2023-12-21 15:31:49,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 15:31:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:31:49,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-21 15:31:49,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:31:50,149 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 15 treesize of output 1 [2023-12-21 15:31:54,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:31:54,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-12-21 15:31:54,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:31:54,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-12-21 15:31:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 15:31:55,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:31:58,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:31:58,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2023-12-21 15:32:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 15:32:32,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:32:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098790476] [2023-12-21 15:32:32,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098790476] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:32:32,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:32:32,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 55 [2023-12-21 15:32:32,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225813509] [2023-12-21 15:32:32,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:32:32,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-21 15:32:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:32:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-21 15:32:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2023-12-21 15:32:32,268 INFO L87 Difference]: Start difference. First operand 1361 states and 1726 transitions. Second operand has 55 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:33:31,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-21 15:35:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:35:25,644 INFO L93 Difference]: Finished difference Result 2928 states and 3678 transitions. [2023-12-21 15:35:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-21 15:35:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2023-12-21 15:35:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:35:25,649 INFO L225 Difference]: With dead ends: 2928 [2023-12-21 15:35:25,649 INFO L226 Difference]: Without dead ends: 2862 [2023-12-21 15:35:25,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7295 ImplicationChecksByTransitivity, 152.7s TimeCoverageRelationStatistics Valid=4280, Invalid=21480, Unknown=0, NotChecked=0, Total=25760 [2023-12-21 15:35:25,651 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1098 mSDsluCounter, 3345 mSDsCounter, 0 mSdLazyCounter, 6054 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 6307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 6054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.6s IncrementalHoareTripleChecker+Time [2023-12-21 15:35:25,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 3492 Invalid, 6307 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [253 Valid, 6054 Invalid, 0 Unknown, 0 Unchecked, 55.6s Time] [2023-12-21 15:35:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2023-12-21 15:35:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 1509. [2023-12-21 15:35:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1482 states have (on average 1.277327935222672) internal successors, (1893), 1489 states have internal predecessors, (1893), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:35:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1928 transitions. [2023-12-21 15:35:26,149 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1928 transitions. Word has length 60 [2023-12-21 15:35:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:35:26,149 INFO L495 AbstractCegarLoop]: Abstraction has 1509 states and 1928 transitions. [2023-12-21 15:35:26,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:35:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1928 transitions. [2023-12-21 15:35:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 15:35:26,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:35:26,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:35:26,162 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 (58)] Forceful destruction successful, exit code 0 [2023-12-21 15:35:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /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 [2023-12-21 15:35:26,357 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:35:26,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:35:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash 618149861, now seen corresponding path program 10 times [2023-12-21 15:35:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:35:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457367188] [2023-12-21 15:35:26,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 15:35:26,358 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 [2023-12-21 15:35:26,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:35:26,359 INFO L229 MonitoredProcess]: Starting monitored process 59 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) [2023-12-21 15:35:26,360 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 (59)] Waiting until timeout for monitored process [2023-12-21 15:35:26,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 15:35:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:35:26,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 15:35:26,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:35:28,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-21 15:35:28,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:35:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 15:35:28,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:35:30,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:35:30,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:35:30,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:35:30,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:35:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 15:35:32,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:35:32,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457367188] [2023-12-21 15:35:32,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457367188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:35:32,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:35:32,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-21 15:35:32,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54913137] [2023-12-21 15:35:32,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:35:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 15:35:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:35:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 15:35:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 15:35:32,365 INFO L87 Difference]: Start difference. First operand 1509 states and 1928 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:35:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:35:37,622 INFO L93 Difference]: Finished difference Result 1957 states and 2499 transitions. [2023-12-21 15:35:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 15:35:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2023-12-21 15:35:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:35:37,625 INFO L225 Difference]: With dead ends: 1957 [2023-12-21 15:35:37,625 INFO L226 Difference]: Without dead ends: 1574 [2023-12-21 15:35:37,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 15:35:37,626 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 83 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:35:37,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1156 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-21 15:35:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2023-12-21 15:35:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1459. [2023-12-21 15:35:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1432 states have (on average 1.2674581005586592) internal successors, (1815), 1439 states have internal predecessors, (1815), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:35:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 1850 transitions. [2023-12-21 15:35:38,110 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 1850 transitions. Word has length 60 [2023-12-21 15:35:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:35:38,110 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 1850 transitions. [2023-12-21 15:35:38,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 15:35:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 1850 transitions. [2023-12-21 15:35:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 15:35:38,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:35:38,112 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:35:38,117 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 (59)] Ended with exit code 0 [2023-12-21 15:35:38,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /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 [2023-12-21 15:35:38,317 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:35:38,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:35:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1794920652, now seen corresponding path program 1 times [2023-12-21 15:35:38,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:35:38,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037479266] [2023-12-21 15:35:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:35:38,318 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 [2023-12-21 15:35:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:35:38,319 INFO L229 MonitoredProcess]: Starting monitored process 60 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) [2023-12-21 15:35:38,320 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 (60)] Waiting until timeout for monitored process [2023-12-21 15:35:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:35:38,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 15:35:38,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:35:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 15:35:39,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:35:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 15:35:39,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:35:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037479266] [2023-12-21 15:35:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037479266] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:35:39,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:35:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-12-21 15:35:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403006975] [2023-12-21 15:35:39,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:35:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 15:35:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:35:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 15:35:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-12-21 15:35:39,880 INFO L87 Difference]: Start difference. First operand 1459 states and 1850 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 15:35:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:35:42,141 INFO L93 Difference]: Finished difference Result 1661 states and 2092 transitions. [2023-12-21 15:35:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 15:35:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2023-12-21 15:35:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:35:42,144 INFO L225 Difference]: With dead ends: 1661 [2023-12-21 15:35:42,144 INFO L226 Difference]: Without dead ends: 1549 [2023-12-21 15:35:42,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-12-21 15:35:42,145 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 89 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 15:35:42,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 693 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 15:35:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2023-12-21 15:35:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1433. [2023-12-21 15:35:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1406 states have (on average 1.263157894736842) internal successors, (1776), 1413 states have internal predecessors, (1776), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:35:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1811 transitions. [2023-12-21 15:35:42,620 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1811 transitions. Word has length 65 [2023-12-21 15:35:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:35:42,620 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1811 transitions. [2023-12-21 15:35:42,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 15:35:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1811 transitions. [2023-12-21 15:35:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-21 15:35:42,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:35:42,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:35:42,626 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 (60)] Forceful destruction successful, exit code 0 [2023-12-21 15:35:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /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 [2023-12-21 15:35:42,827 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:35:42,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:35:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -476557631, now seen corresponding path program 11 times [2023-12-21 15:35:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:35:42,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700839231] [2023-12-21 15:35:42,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 15:35:42,828 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 [2023-12-21 15:35:42,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:35:42,828 INFO L229 MonitoredProcess]: Starting monitored process 61 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) [2023-12-21 15:35:42,835 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 (61)] Waiting until timeout for monitored process [2023-12-21 15:35:43,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-21 15:35:43,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:35:43,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 15:35:43,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:35:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:35:45,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:35:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 15:35:51,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:35:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700839231] [2023-12-21 15:35:51,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700839231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:35:51,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:35:51,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2023-12-21 15:35:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082448954] [2023-12-21 15:35:51,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:35:51,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-21 15:35:51,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:35:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-21 15:35:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 15:35:51,470 INFO L87 Difference]: Start difference. First operand 1433 states and 1811 transitions. Second operand has 48 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:36:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:36:07,297 INFO L93 Difference]: Finished difference Result 3281 states and 4171 transitions. [2023-12-21 15:36:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-21 15:36:07,298 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2023-12-21 15:36:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:36:07,318 INFO L225 Difference]: With dead ends: 3281 [2023-12-21 15:36:07,318 INFO L226 Difference]: Without dead ends: 3163 [2023-12-21 15:36:07,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1614, Invalid=5868, Unknown=0, NotChecked=0, Total=7482 [2023-12-21 15:36:07,328 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1121 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:36:07,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2670 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-12-21 15:36:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2023-12-21 15:36:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1917. [2023-12-21 15:36:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1890 states have (on average 1.2777777777777777) internal successors, (2415), 1897 states have internal predecessors, (2415), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:36:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2450 transitions. [2023-12-21 15:36:07,989 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2450 transitions. Word has length 62 [2023-12-21 15:36:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:36:07,990 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 2450 transitions. [2023-12-21 15:36:07,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:36:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2450 transitions. [2023-12-21 15:36:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 15:36:07,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:36:07,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:36:07,999 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 (61)] Forceful destruction successful, exit code 0 [2023-12-21 15:36:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /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 [2023-12-21 15:36:08,197 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:36:08,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:36:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1933842113, now seen corresponding path program 2 times [2023-12-21 15:36:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:36:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889948370] [2023-12-21 15:36:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:36:08,198 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 [2023-12-21 15:36:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:36:08,199 INFO L229 MonitoredProcess]: Starting monitored process 62 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) [2023-12-21 15:36:08,203 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 (62)] Waiting until timeout for monitored process [2023-12-21 15:36:08,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:36:08,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:36:08,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 15:36:08,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:36:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 15:36:08,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:36:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-21 15:36:09,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:36:09,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889948370] [2023-12-21 15:36:09,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889948370] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:36:09,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:36:09,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-12-21 15:36:09,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155806792] [2023-12-21 15:36:09,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:36:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 15:36:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:36:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 15:36:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:36:09,677 INFO L87 Difference]: Start difference. First operand 1917 states and 2450 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 15:36:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:36:11,948 INFO L93 Difference]: Finished difference Result 2132 states and 2712 transitions. [2023-12-21 15:36:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 15:36:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 66 [2023-12-21 15:36:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:36:11,969 INFO L225 Difference]: With dead ends: 2132 [2023-12-21 15:36:11,969 INFO L226 Difference]: Without dead ends: 2054 [2023-12-21 15:36:11,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-21 15:36:11,970 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:36:11,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 588 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 15:36:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2023-12-21 15:36:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1915. [2023-12-21 15:36:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1888 states have (on average 1.2770127118644068) internal successors, (2411), 1895 states have internal predecessors, (2411), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:36:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2446 transitions. [2023-12-21 15:36:12,586 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2446 transitions. Word has length 66 [2023-12-21 15:36:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:36:12,586 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2446 transitions. [2023-12-21 15:36:12,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 15:36:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2446 transitions. [2023-12-21 15:36:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-21 15:36:12,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:36:12,588 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:36:12,595 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 (62)] Forceful destruction successful, exit code 0 [2023-12-21 15:36:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /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 [2023-12-21 15:36:12,792 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:36:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:36:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1650237459, now seen corresponding path program 12 times [2023-12-21 15:36:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:36:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502330593] [2023-12-21 15:36:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 15:36:12,793 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 [2023-12-21 15:36:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:36:12,794 INFO L229 MonitoredProcess]: Starting monitored process 63 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) [2023-12-21 15:36:12,795 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 (63)] Waiting until timeout for monitored process [2023-12-21 15:36:13,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 15:36:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:36:13,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 15:36:13,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:36:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-21 15:36:14,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:36:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 15:36:15,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:36:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502330593] [2023-12-21 15:36:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502330593] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:36:15,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:36:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-12-21 15:36:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254941260] [2023-12-21 15:36:15,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:36:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 15:36:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:36:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 15:36:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-12-21 15:36:15,594 INFO L87 Difference]: Start difference. First operand 1915 states and 2446 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:36:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:36:22,581 INFO L93 Difference]: Finished difference Result 3077 states and 3915 transitions. [2023-12-21 15:36:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-21 15:36:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2023-12-21 15:36:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:36:22,598 INFO L225 Difference]: With dead ends: 3077 [2023-12-21 15:36:22,598 INFO L226 Difference]: Without dead ends: 2597 [2023-12-21 15:36:22,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2023-12-21 15:36:22,599 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 352 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:36:22,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1661 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-21 15:36:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2023-12-21 15:36:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1833. [2023-12-21 15:36:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1806 states have (on average 1.2707641196013288) internal successors, (2295), 1813 states have internal predecessors, (2295), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:36:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2330 transitions. [2023-12-21 15:36:23,269 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2330 transitions. Word has length 63 [2023-12-21 15:36:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:36:23,270 INFO L495 AbstractCegarLoop]: Abstraction has 1833 states and 2330 transitions. [2023-12-21 15:36:23,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 15:36:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2330 transitions. [2023-12-21 15:36:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-21 15:36:23,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:36:23,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:36:23,280 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 (63)] Forceful destruction successful, exit code 0 [2023-12-21 15:36:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /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 [2023-12-21 15:36:23,478 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:36:23,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:36:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1698138136, now seen corresponding path program 3 times [2023-12-21 15:36:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:36:23,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296846062] [2023-12-21 15:36:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:36:23,479 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 [2023-12-21 15:36:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:36:23,480 INFO L229 MonitoredProcess]: Starting monitored process 64 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) [2023-12-21 15:36:23,481 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 (64)] Waiting until timeout for monitored process [2023-12-21 15:36:23,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 15:36:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:36:23,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 15:36:23,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:36:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 15:36:25,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:36:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 15:36:27,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:36:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296846062] [2023-12-21 15:36:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296846062] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:36:27,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:36:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2023-12-21 15:36:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807628286] [2023-12-21 15:36:27,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:36:27,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 15:36:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:36:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 15:36:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-12-21 15:36:27,122 INFO L87 Difference]: Start difference. First operand 1833 states and 2330 transitions. Second operand has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 15:36:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:36:33,596 INFO L93 Difference]: Finished difference Result 2611 states and 3329 transitions. [2023-12-21 15:36:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 15:36:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 67 [2023-12-21 15:36:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:36:33,600 INFO L225 Difference]: With dead ends: 2611 [2023-12-21 15:36:33,600 INFO L226 Difference]: Without dead ends: 2399 [2023-12-21 15:36:33,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=482, Invalid=1774, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 15:36:33,601 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 400 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-21 15:36:33,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 948 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-21 15:36:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2023-12-21 15:36:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 1843. [2023-12-21 15:36:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1816 states have (on average 1.2621145374449338) internal successors, (2292), 1823 states have internal predecessors, (2292), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:36:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2327 transitions. [2023-12-21 15:36:34,324 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2327 transitions. Word has length 67 [2023-12-21 15:36:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:36:34,326 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2327 transitions. [2023-12-21 15:36:34,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 15:36:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2327 transitions. [2023-12-21 15:36:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-21 15:36:34,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:36:34,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:36:34,332 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 (64)] Forceful destruction successful, exit code 0 [2023-12-21 15:36:34,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /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 [2023-12-21 15:36:34,532 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:36:34,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:36:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1653548102, now seen corresponding path program 13 times [2023-12-21 15:36:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:36:34,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225852609] [2023-12-21 15:36:34,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 15:36:34,533 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 [2023-12-21 15:36:34,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:36:34,537 INFO L229 MonitoredProcess]: Starting monitored process 65 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) [2023-12-21 15:36:34,538 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 (65)] Waiting until timeout for monitored process [2023-12-21 15:36:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:36:34,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 15:36:34,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:36:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 15:36:35,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:36:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 15:36:37,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:36:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225852609] [2023-12-21 15:36:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225852609] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:36:37,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:36:37,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-12-21 15:36:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63186734] [2023-12-21 15:36:37,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:36:37,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 15:36:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:36:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 15:36:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-12-21 15:36:37,179 INFO L87 Difference]: Start difference. First operand 1843 states and 2327 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:36:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:36:43,395 INFO L93 Difference]: Finished difference Result 2514 states and 3150 transitions. [2023-12-21 15:36:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 15:36:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2023-12-21 15:36:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:36:43,399 INFO L225 Difference]: With dead ends: 2514 [2023-12-21 15:36:43,399 INFO L226 Difference]: Without dead ends: 2305 [2023-12-21 15:36:43,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 15:36:43,400 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 427 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-21 15:36:43,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1452 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-21 15:36:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2023-12-21 15:36:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1768. [2023-12-21 15:36:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1741 states have (on average 1.2578977599080987) internal successors, (2190), 1748 states have internal predecessors, (2190), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:36:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2225 transitions. [2023-12-21 15:36:44,011 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 2225 transitions. Word has length 64 [2023-12-21 15:36:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:36:44,011 INFO L495 AbstractCegarLoop]: Abstraction has 1768 states and 2225 transitions. [2023-12-21 15:36:44,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:36:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 2225 transitions. [2023-12-21 15:36:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-21 15:36:44,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:36:44,013 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:36:44,018 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 (65)] Forceful destruction successful, exit code 0 [2023-12-21 15:36:44,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /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 [2023-12-21 15:36:44,218 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:36:44,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:36:44,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1031863394, now seen corresponding path program 9 times [2023-12-21 15:36:44,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:36:44,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551900507] [2023-12-21 15:36:44,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:36:44,218 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 [2023-12-21 15:36:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:36:44,219 INFO L229 MonitoredProcess]: Starting monitored process 66 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) [2023-12-21 15:36:44,221 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 (66)] Waiting until timeout for monitored process [2023-12-21 15:36:44,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 15:36:44,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:36:44,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 15:36:44,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:36:44,873 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 15 treesize of output 1 [2023-12-21 15:36:48,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:36:48,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-12-21 15:36:49,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:36:49,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-12-21 15:36:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 15:36:50,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:36:54,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:36:54,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:36:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-21 15:36:59,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:36:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551900507] [2023-12-21 15:36:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551900507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:36:59,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:36:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2023-12-21 15:36:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131467540] [2023-12-21 15:36:59,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:36:59,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 15:36:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:36:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 15:36:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 15:36:59,516 INFO L87 Difference]: Start difference. First operand 1768 states and 2225 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:37:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:37:36,195 INFO L93 Difference]: Finished difference Result 2707 states and 3401 transitions. [2023-12-21 15:37:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-21 15:37:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2023-12-21 15:37:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:37:36,199 INFO L225 Difference]: With dead ends: 2707 [2023-12-21 15:37:36,199 INFO L226 Difference]: Without dead ends: 2696 [2023-12-21 15:37:36,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=945, Invalid=5215, Unknown=2, NotChecked=0, Total=6162 [2023-12-21 15:37:36,200 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 471 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-12-21 15:37:36,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 680 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-12-21 15:37:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2023-12-21 15:37:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1757. [2023-12-21 15:37:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1730 states have (on average 1.2572254335260116) internal successors, (2175), 1737 states have internal predecessors, (2175), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 15:37:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2210 transitions. [2023-12-21 15:37:36,854 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2210 transitions. Word has length 64 [2023-12-21 15:37:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:37:36,854 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2210 transitions. [2023-12-21 15:37:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:37:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2210 transitions. [2023-12-21 15:37:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-21 15:37:36,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:37:36,868 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:37:36,876 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 (66)] Forceful destruction successful, exit code 0 [2023-12-21 15:37:37,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /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 [2023-12-21 15:37:37,076 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:37:37,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:37:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1284095221, now seen corresponding path program 1 times [2023-12-21 15:37:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:37:37,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945288973] [2023-12-21 15:37:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:37:37,076 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 [2023-12-21 15:37:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:37:37,077 INFO L229 MonitoredProcess]: Starting monitored process 67 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) [2023-12-21 15:37:37,078 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 (67)] Waiting until timeout for monitored process [2023-12-21 15:37:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:37:37,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 15:37:37,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:37:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 15:37:37,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:37:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-21 15:37:38,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:37:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945288973] [2023-12-21 15:37:38,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945288973] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:37:38,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:37:38,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-12-21 15:37:38,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643944106] [2023-12-21 15:37:38,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:37:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 15:37:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:37:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 15:37:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-12-21 15:37:38,517 INFO L87 Difference]: Start difference. First operand 1757 states and 2210 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 15:37:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:37:41,233 INFO L93 Difference]: Finished difference Result 1955 states and 2455 transitions. [2023-12-21 15:37:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 15:37:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 68 [2023-12-21 15:37:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:37:41,236 INFO L225 Difference]: With dead ends: 1955 [2023-12-21 15:37:41,236 INFO L226 Difference]: Without dead ends: 1927 [2023-12-21 15:37:41,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2023-12-21 15:37:41,237 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 221 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:37:41,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 582 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 15:37:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2023-12-21 15:37:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1764. [2023-12-21 15:37:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1736 states have (on average 1.256336405529954) internal successors, (2181), 1743 states have internal predecessors, (2181), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-21 15:37:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2218 transitions. [2023-12-21 15:37:41,936 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2218 transitions. Word has length 68 [2023-12-21 15:37:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:37:41,936 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2218 transitions. [2023-12-21 15:37:41,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 15:37:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2218 transitions. [2023-12-21 15:37:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 15:37:41,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:37:41,938 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:37:41,943 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 (67)] Forceful destruction successful, exit code 0 [2023-12-21 15:37:42,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /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 [2023-12-21 15:37:42,143 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:37:42,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:37:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1719019840, now seen corresponding path program 14 times [2023-12-21 15:37:42,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:37:42,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854008512] [2023-12-21 15:37:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:37:42,143 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 [2023-12-21 15:37:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:37:42,145 INFO L229 MonitoredProcess]: Starting monitored process 68 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) [2023-12-21 15:37:42,146 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 (68)] Waiting until timeout for monitored process [2023-12-21 15:37:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:37:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:37:42,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 15:37:42,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:37:45,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-21 15:37:45,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:37:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 15:37:45,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:37:47,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:37:47,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:37:47,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:37:47,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:37:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 15:37:50,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:37:50,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854008512] [2023-12-21 15:37:50,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854008512] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:37:50,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:37:50,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 43 [2023-12-21 15:37:50,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215774815] [2023-12-21 15:37:50,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:37:50,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-21 15:37:50,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:37:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-21 15:37:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 15:37:50,546 INFO L87 Difference]: Start difference. First operand 1764 states and 2218 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 41 states have internal predecessors, (98), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:38:07,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 15:38:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:38:26,702 INFO L93 Difference]: Finished difference Result 3548 states and 4543 transitions. [2023-12-21 15:38:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-21 15:38:26,703 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 41 states have internal predecessors, (98), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2023-12-21 15:38:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:38:26,706 INFO L225 Difference]: With dead ends: 3548 [2023-12-21 15:38:26,706 INFO L226 Difference]: Without dead ends: 3163 [2023-12-21 15:38:26,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1139, Invalid=10417, Unknown=0, NotChecked=0, Total=11556 [2023-12-21 15:38:26,707 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 353 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:38:26,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2275 Invalid, 3499 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 3468 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2023-12-21 15:38:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2023-12-21 15:38:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1924. [2023-12-21 15:38:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1896 states have (on average 1.2779535864978904) internal successors, (2423), 1903 states have internal predecessors, (2423), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-21 15:38:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2460 transitions. [2023-12-21 15:38:27,438 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2460 transitions. Word has length 65 [2023-12-21 15:38:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:38:27,438 INFO L495 AbstractCegarLoop]: Abstraction has 1924 states and 2460 transitions. [2023-12-21 15:38:27,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 41 states have internal predecessors, (98), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 15:38:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2460 transitions. [2023-12-21 15:38:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-21 15:38:27,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:38:27,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:38:27,446 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 (68)] Ended with exit code 0 [2023-12-21 15:38:27,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /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 [2023-12-21 15:38:27,646 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:38:27,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:38:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1072375884, now seen corresponding path program 4 times [2023-12-21 15:38:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:38:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141357813] [2023-12-21 15:38:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 15:38:27,647 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 [2023-12-21 15:38:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:38:27,648 INFO L229 MonitoredProcess]: Starting monitored process 69 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) [2023-12-21 15:38:27,653 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 (69)] Waiting until timeout for monitored process [2023-12-21 15:38:27,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 15:38:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:38:27,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 15:38:27,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:38:32,597 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7| (_ BitVec 32))) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7|) (_ bv4 32)) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7|) (_ bv4 32)))) is different from true [2023-12-21 15:38:36,860 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8|) (_ bv4 32)) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8|) (_ bv4 32)))) is different from true [2023-12-21 15:38:37,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 15:38:37,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:38:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 15 refuted. 1 times theorem prover too weak. 17 trivial. 3 not checked. [2023-12-21 15:38:37,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:38:38,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:38:38,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:38:38,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:38:38,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:38:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-21 15:38:38,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:38:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141357813] [2023-12-21 15:38:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141357813] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:38:38,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:38:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2023-12-21 15:38:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171690119] [2023-12-21 15:38:38,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:38:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 15:38:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:38:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 15:38:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=394, Unknown=2, NotChecked=82, Total=552 [2023-12-21 15:38:38,904 INFO L87 Difference]: Start difference. First operand 1924 states and 2460 transitions. Second operand has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 15:38:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:38:54,685 INFO L93 Difference]: Finished difference Result 2526 states and 3251 transitions. [2023-12-21 15:38:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 15:38:54,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 70 [2023-12-21 15:38:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:38:54,688 INFO L225 Difference]: With dead ends: 2526 [2023-12-21 15:38:54,688 INFO L226 Difference]: Without dead ends: 2497 [2023-12-21 15:38:54,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=127, Invalid=688, Unknown=5, NotChecked=110, Total=930 [2023-12-21 15:38:54,689 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 127 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-21 15:38:54,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 767 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 584 Invalid, 0 Unknown, 361 Unchecked, 2.0s Time] [2023-12-21 15:38:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2023-12-21 15:38:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1988. [2023-12-21 15:38:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1952 states have (on average 1.2745901639344261) internal successors, (2488), 1961 states have internal predecessors, (2488), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-21 15:38:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2535 transitions. [2023-12-21 15:38:55,466 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2535 transitions. Word has length 70 [2023-12-21 15:38:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:38:55,466 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2535 transitions. [2023-12-21 15:38:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 15:38:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2535 transitions. [2023-12-21 15:38:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-21 15:38:55,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:38:55,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:38:55,475 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 (69)] Forceful destruction successful, exit code 0 [2023-12-21 15:38:55,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /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 [2023-12-21 15:38:55,673 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:38:55,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:38:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -719471970, now seen corresponding path program 1 times [2023-12-21 15:38:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:38:55,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711438280] [2023-12-21 15:38:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 15:38:55,674 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 [2023-12-21 15:38:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:38:55,675 INFO L229 MonitoredProcess]: Starting monitored process 70 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) [2023-12-21 15:38:55,675 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 (70)] Waiting until timeout for monitored process [2023-12-21 15:38:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 15:38:55,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 15:38:55,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:38:58,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 15:38:58,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 15:38:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 15:38:58,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:38:59,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:38:59,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-12-21 15:38:59,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:38:59,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-12-21 15:39:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 15:39:01,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:39:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711438280] [2023-12-21 15:39:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711438280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:39:01,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:39:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-12-21 15:39:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245013517] [2023-12-21 15:39:01,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:39:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 15:39:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:39:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 15:39:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-12-21 15:39:01,533 INFO L87 Difference]: Start difference. First operand 1988 states and 2535 transitions. Second operand has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 15:39:06,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 15:39:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:39:13,013 INFO L93 Difference]: Finished difference Result 2582 states and 3317 transitions. [2023-12-21 15:39:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 15:39:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 71 [2023-12-21 15:39:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:39:13,016 INFO L225 Difference]: With dead ends: 2582 [2023-12-21 15:39:13,016 INFO L226 Difference]: Without dead ends: 2580 [2023-12-21 15:39:13,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 15:39:13,017 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 127 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:39:13,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2003 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1512 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2023-12-21 15:39:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2023-12-21 15:39:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2545. [2023-12-21 15:39:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2496 states have (on average 1.2840544871794872) internal successors, (3205), 2509 states have internal predecessors, (3205), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (31), 23 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-21 15:39:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3269 transitions. [2023-12-21 15:39:14,077 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3269 transitions. Word has length 71 [2023-12-21 15:39:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:39:14,077 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 3269 transitions. [2023-12-21 15:39:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 15:39:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3269 transitions. [2023-12-21 15:39:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-21 15:39:14,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:39:14,079 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:39:14,086 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 (70)] Forceful destruction successful, exit code 0 [2023-12-21 15:39:14,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /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 [2023-12-21 15:39:14,288 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:39:14,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:39:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash 582186866, now seen corresponding path program 2 times [2023-12-21 15:39:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:39:14,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299944083] [2023-12-21 15:39:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 15:39:14,289 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 [2023-12-21 15:39:14,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:39:14,290 INFO L229 MonitoredProcess]: Starting monitored process 71 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) [2023-12-21 15:39:14,290 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 (71)] Waiting until timeout for monitored process [2023-12-21 15:39:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 15:39:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:39:14,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 15:39:14,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:39:15,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 15:39:15,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 15:39:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-21 15:39:15,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:39:16,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:16,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 15:39:16,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:16,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-12-21 15:39:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 15:39:16,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:39:16,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299944083] [2023-12-21 15:39:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299944083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:39:16,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:39:16,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2023-12-21 15:39:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009619656] [2023-12-21 15:39:16,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:39:16,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 15:39:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:39:16,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 15:39:16,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-12-21 15:39:16,616 INFO L87 Difference]: Start difference. First operand 2545 states and 3269 transitions. Second operand has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:39:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 15:39:20,067 INFO L93 Difference]: Finished difference Result 3278 states and 4229 transitions. [2023-12-21 15:39:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 15:39:20,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 71 [2023-12-21 15:39:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 15:39:20,071 INFO L225 Difference]: With dead ends: 3278 [2023-12-21 15:39:20,071 INFO L226 Difference]: Without dead ends: 3234 [2023-12-21 15:39:20,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-12-21 15:39:20,071 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 141 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:39:20,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 788 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 15:39:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-12-21 15:39:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3200. [2023-12-21 15:39:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3150 states have (on average 1.2920634920634921) internal successors, (4070), 3164 states have internal predecessors, (4070), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (30), 23 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-21 15:39:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 4133 transitions. [2023-12-21 15:39:21,397 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 4133 transitions. Word has length 71 [2023-12-21 15:39:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 15:39:21,397 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 4133 transitions. [2023-12-21 15:39:21,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 15:39:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 4133 transitions. [2023-12-21 15:39:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-21 15:39:21,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 15:39:21,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:39:21,404 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 (71)] Forceful destruction successful, exit code 0 [2023-12-21 15:39:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /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 [2023-12-21 15:39:21,604 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 15:39:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 15:39:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1570273380, now seen corresponding path program 15 times [2023-12-21 15:39:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 15:39:21,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432961339] [2023-12-21 15:39:21,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 15:39:21,605 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 [2023-12-21 15:39:21,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 15:39:21,606 INFO L229 MonitoredProcess]: Starting monitored process 72 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) [2023-12-21 15:39:21,606 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 (72)] Waiting until timeout for monitored process [2023-12-21 15:39:21,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 15:39:21,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 15:39:21,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-21 15:39:21,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 15:39:29,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:29,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-12-21 15:39:29,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:29,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-12-21 15:39:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 15:39:30,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 15:39:45,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:45,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 125 [2023-12-21 15:39:45,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 15:39:45,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 103 [2023-12-21 15:41:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 15:41:22,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 15:41:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432961339] [2023-12-21 15:41:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432961339] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 15:41:22,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 15:41:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29] total 63 [2023-12-21 15:41:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058083925] [2023-12-21 15:41:22,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 15:41:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-21 15:41:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 15:41:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-21 15:41:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=3451, Unknown=2, NotChecked=0, Total=3906 [2023-12-21 15:41:22,646 INFO L87 Difference]: Start difference. First operand 3200 states and 4133 transitions. Second operand has 63 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 60 states have internal predecessors, (106), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Received shutdown request... [2023-12-21 15:42:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 15:42:01,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 98.8s TimeCoverageRelationStatistics Valid=656, Invalid=4744, Unknown=2, NotChecked=0, Total=5402 [2023-12-21 15:42:01,291 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-12-21 15:42:01,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 240 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2023-12-21 15:42:01,291 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 15:42:01,296 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 (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 15:42:01,296 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 [2023-12-21 15:42:01,301 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 (72)] Forceful destruction successful, exit code 0 [2023-12-21 15:42:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /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 [2023-12-21 15:42:01,492 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (3200states) and FLOYD_HOARE automaton (currently 26 states, 63 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-6-5-4-1 term,while SimplifyDDA2 was simplifying 5 xjuncts wrt. a ∧-2-1 context. [2023-12-21 15:42:01,496 INFO L445 BasicCegarLoop]: Path program histogram: [15, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 15:42:01,499 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 15:42:01,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:42:01 BoogieIcfgContainer [2023-12-21 15:42:01,501 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 15:42:01,503 INFO L158 Benchmark]: Toolchain (without parser) took 875139.32ms. Allocated memory was 179.3MB in the beginning and 684.7MB in the end (delta: 505.4MB). Free memory was 131.3MB in the beginning and 529.7MB in the end (delta: -398.4MB). Peak memory consumption was 107.9MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,503 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 137.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 15:42:01,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.96ms. Allocated memory is still 179.3MB. Free memory was 131.3MB in the beginning and 110.8MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,503 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.16ms. Allocated memory is still 179.3MB. Free memory was 110.8MB in the beginning and 108.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,503 INFO L158 Benchmark]: Boogie Preprocessor took 38.70ms. Allocated memory is still 179.3MB. Free memory was 108.6MB in the beginning and 105.7MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,503 INFO L158 Benchmark]: RCFGBuilder took 448.42ms. Allocated memory is still 179.3MB. Free memory was 105.7MB in the beginning and 85.8MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,504 INFO L158 Benchmark]: TraceAbstraction took 874220.05ms. Allocated memory was 179.3MB in the beginning and 684.7MB in the end (delta: 505.4MB). Free memory was 85.2MB in the beginning and 529.7MB in the end (delta: -444.5MB). Peak memory consumption was 61.8MB. Max. memory is 8.0GB. [2023-12-21 15:42:01,504 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 137.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 364.96ms. Allocated memory is still 179.3MB. Free memory was 131.3MB in the beginning and 110.8MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 62.16ms. Allocated memory is still 179.3MB. Free memory was 110.8MB in the beginning and 108.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.70ms. Allocated memory is still 179.3MB. Free memory was 108.6MB in the beginning and 105.7MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 448.42ms. Allocated memory is still 179.3MB. Free memory was 105.7MB in the beginning and 85.8MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 874220.05ms. Allocated memory was 179.3MB in the beginning and 684.7MB in the end (delta: 505.4MB). Free memory was 85.2MB in the beginning and 529.7MB in the end (delta: -444.5MB). Peak memory consumption was 61.8MB. 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: 22]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 22). Cancelled while NwaCegarLoop was constructing difference of abstraction (3200states) and FLOYD_HOARE automaton (currently 26 states, 63 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-6-5-4-1 term,while SimplifyDDA2 was simplifying 5 xjuncts wrt. a ∧-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 874.2s, OverallIterations: 71, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.1s, AutomataDifference: 539.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 17013 SdHoareTripleChecker+Valid, 191.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16533 mSDsluCounter, 59814 SdHoareTripleChecker+Invalid, 171.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1001 IncrementalHoareTripleChecker+Unchecked, 54791 mSDsCounter, 2124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51083 IncrementalHoareTripleChecker+Invalid, 54210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2124 mSolverCounterUnsat, 5023 mSDtfsCounter, 51083 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7073 GetRequests, 4832 SyntacticMatches, 15 SemanticMatches, 2225 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 29789 ImplicationChecksByTransitivity, 522.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3200occurred in iteration=70, InterpolantAutomatonStates: 1617, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.8s AutomataMinimizationTime, 70 MinimizatonAttempts, 17087 StatesRemovedByMinimization, 65 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 295.9s InterpolantComputationTime, 3375 NumberOfCodeBlocks, 3252 NumberOfCodeBlocksAsserted, 121 NumberOfCheckSat, 6200 ConstructedInterpolants, 203 QuantifiedInterpolants, 63005 SizeOfPredicates, 710 NumberOfNonLiveVariables, 8567 ConjunctsInSsa, 1370 ConjunctsInUnsatCore, 129 InterpolantComputations, 16 PerfectInterpolantSequences, 2434/4137 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