/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-tiling/rewnifrev2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 17:53:40,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 17:53:40,745 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 17:53:40,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 17:53:40,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 17:53:40,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 17:53:40,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 17:53:40,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 17:53:40,763 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 17:53:40,763 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 17:53:40,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 17:53:40,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 17:53:40,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 17:53:40,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 17:53:40,764 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 17:53:40,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 17:53:40,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 17:53:40,765 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 17:53:40,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 17:53:40,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 17:53:40,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 17:53:40,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-21 17:53:40,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 17:53:40,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 17:53:40,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 17:53:40,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 17:53:40,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 17:53:40,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 17:53:40,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 17:53:40,769 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-21 17:53:40,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-21 17:53:40,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 17:53:40,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 17:53:40,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 17:53:40,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 17:53:40,902 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 17:53:40,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnifrev2.c [2023-12-21 17:53:41,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 17:53:41,916 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 17:53:41,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnifrev2.c [2023-12-21 17:53:41,921 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263cbe790/460e7f280cad41ad8f1b20690b88f69b/FLAGdeb548fb9 [2023-12-21 17:53:41,933 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263cbe790/460e7f280cad41ad8f1b20690b88f69b [2023-12-21 17:53:41,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 17:53:41,936 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 17:53:41,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 17:53:41,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 17:53:41,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 17:53:41,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:53:41" (1/1) ... [2023-12-21 17:53:41,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768bc2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:41, skipping insertion in model container [2023-12-21 17:53:41,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:53:41" (1/1) ... [2023-12-21 17:53:41,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 17:53:42,093 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-tiling/rewnifrev2.c[401,414] [2023-12-21 17:53:42,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 17:53:42,115 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 17:53:42,123 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-tiling/rewnifrev2.c[401,414] [2023-12-21 17:53:42,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 17:53:42,139 INFO L206 MainTranslator]: Completed translation [2023-12-21 17:53:42,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42 WrapperNode [2023-12-21 17:53:42,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 17:53:42,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 17:53:42,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 17:53:42,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 17:53:42,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,167 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-12-21 17:53:42,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 17:53:42,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 17:53:42,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 17:53:42,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 17:53:42,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,190 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-21 17:53:42,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 17:53:42,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 17:53:42,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 17:53:42,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 17:53:42,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (1/1) ... [2023-12-21 17:53:42,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 17:53:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 17:53:42,221 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 17:53:42,244 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 17:53:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 17:53:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-21 17:53:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 17:53:42,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-21 17:53:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-21 17:53:42,339 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 17:53:42,340 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 17:53:42,437 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 17:53:42,465 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 17:53:42,465 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-21 17:53:42,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:53:42 BoogieIcfgContainer [2023-12-21 17:53:42,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 17:53:42,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 17:53:42,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 17:53:42,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 17:53:42,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:53:41" (1/3) ... [2023-12-21 17:53:42,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd3b54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:53:42, skipping insertion in model container [2023-12-21 17:53:42,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:53:42" (2/3) ... [2023-12-21 17:53:42,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd3b54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:53:42, skipping insertion in model container [2023-12-21 17:53:42,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:53:42" (3/3) ... [2023-12-21 17:53:42,471 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2023-12-21 17:53:42,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 17:53:42,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 17:53:42,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 17:53:42,519 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;@49747e28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 17:53:42,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 17:53:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 17:53:42,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:42,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:42,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:42,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 807800041, now seen corresponding path program 1 times [2023-12-21 17:53:42,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:42,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901438285] [2023-12-21 17:53:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 17:53:42,538 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 17:53:42,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:42,540 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 17:53:42,544 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 17:53:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:53:42,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 17:53:42,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:42,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 17:53:42,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901438285] [2023-12-21 17:53:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901438285] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 17:53:42,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 17:53:42,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 17:53:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306951256] [2023-12-21 17:53:42,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 17:53:42,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 17:53:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 17:53:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 17:53:42,635 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:53:42,654 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2023-12-21 17:53:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 17:53:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 17:53:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:53:42,660 INFO L225 Difference]: With dead ends: 21 [2023-12-21 17:53:42,661 INFO L226 Difference]: Without dead ends: 9 [2023-12-21 17:53:42,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 17:53:42,666 INFO L413 NwaCegarLoop]: 10 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, 10 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 17:53:42,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 17:53:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-21 17:53:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-21 17:53:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-12-21 17:53:42,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-12-21 17:53:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:53:42,686 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-12-21 17:53:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-12-21 17:53:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 17:53:42,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:42,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:42,691 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 17:53:42,889 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 17:53:42,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:42,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 802258915, now seen corresponding path program 1 times [2023-12-21 17:53:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:42,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832144174] [2023-12-21 17:53:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 17:53:42,891 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 17:53:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:42,892 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 17:53:42,896 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 17:53:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:53:42,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 17:53:42,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:42,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 17:53:42,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832144174] [2023-12-21 17:53:42,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832144174] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 17:53:42,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 17:53:42,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 17:53:42,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70863472] [2023-12-21 17:53:42,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 17:53:42,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 17:53:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 17:53:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 17:53:42,988 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:53:43,036 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-12-21 17:53:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 17:53:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 17:53:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:53:43,037 INFO L225 Difference]: With dead ends: 21 [2023-12-21 17:53:43,038 INFO L226 Difference]: Without dead ends: 15 [2023-12-21 17:53:43,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 17:53:43,039 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 17:53:43,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 17:53:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-21 17:53:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2023-12-21 17:53:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-12-21 17:53:43,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-12-21 17:53:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:53:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-12-21 17:53:43,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-12-21 17:53:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 17:53:43,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:43,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:43,054 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 17:53:43,251 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 17:53:43,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:43,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 352275824, now seen corresponding path program 1 times [2023-12-21 17:53:43,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:43,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672503780] [2023-12-21 17:53:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 17:53:43,253 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 17:53:43,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:43,254 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 17:53:43,256 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 17:53:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:53:43,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 17:53:43,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:43,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 27 [2023-12-21 17:53:43,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:53:43,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:53:43,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:53:43,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2023-12-21 17:53:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:43,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:53:43,777 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 22 [2023-12-21 17:53:43,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 66 [2023-12-21 17:53:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:43,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:43,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672503780] [2023-12-21 17:53:43,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672503780] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 17:53:43,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 17:53:43,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-12-21 17:53:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366332568] [2023-12-21 17:53:43,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 17:53:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 17:53:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 17:53:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 17:53:43,799 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:53:43,891 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-12-21 17:53:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 17:53:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-21 17:53:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:53:43,892 INFO L225 Difference]: With dead ends: 15 [2023-12-21 17:53:43,892 INFO L226 Difference]: Without dead ends: 13 [2023-12-21 17:53:43,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-12-21 17:53:43,893 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 17:53:43,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 17:53:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-21 17:53:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-12-21 17:53:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-12-21 17:53:43,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-12-21 17:53:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:53:43,896 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-12-21 17:53:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-12-21 17:53:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 17:53:43,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:43,896 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:43,898 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 17:53:44,096 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 17:53:44,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:44,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2049268572, now seen corresponding path program 1 times [2023-12-21 17:53:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:44,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669726293] [2023-12-21 17:53:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 17:53:44,098 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 17:53:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:44,100 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 17:53:44,104 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 17:53:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:53:44,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 17:53:44,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:44,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:53:44,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:53:44,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:53:44,414 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 25 [2023-12-21 17:53:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:44,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:53:44,576 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 26 treesize of output 24 [2023-12-21 17:53:44,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 58 [2023-12-21 17:53:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:44,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:44,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669726293] [2023-12-21 17:53:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669726293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:53:44,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:53:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-12-21 17:53:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697516180] [2023-12-21 17:53:44,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:53:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 17:53:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 17:53:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-21 17:53:44,592 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:46,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:53:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:53:46,841 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-12-21 17:53:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 17:53:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-21 17:53:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:53:46,841 INFO L225 Difference]: With dead ends: 23 [2023-12-21 17:53:46,841 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 17:53:46,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2023-12-21 17:53:46,842 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-21 17:53:46,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 19 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-21 17:53:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 17:53:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-12-21 17:53:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-12-21 17:53:46,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-12-21 17:53:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:53:46,846 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-12-21 17:53:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-12-21 17:53:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 17:53:46,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:46,847 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:46,851 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 17:53:47,048 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 17:53:47,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:47,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1100183024, now seen corresponding path program 2 times [2023-12-21 17:53:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691214521] [2023-12-21 17:53:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 17:53:47,050 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 17:53:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:47,051 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 17:53:47,054 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 17:53:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 17:53:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:53:47,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 17:53:47,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:47,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:53:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:47,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:47,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691214521] [2023-12-21 17:53:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691214521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:53:47,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:53:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-21 17:53:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425776563] [2023-12-21 17:53:47,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:53:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 17:53:47,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 17:53:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-12-21 17:53:47,349 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:53:47,524 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-12-21 17:53:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 17:53:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 17:53:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:53:47,525 INFO L225 Difference]: With dead ends: 30 [2023-12-21 17:53:47,525 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 17:53:47,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-12-21 17:53:47,526 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 17:53:47,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 23 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 17:53:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 17:53:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-12-21 17:53:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-12-21 17:53:47,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2023-12-21 17:53:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:53:47,530 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-12-21 17:53:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-12-21 17:53:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 17:53:47,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:53:47,531 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 17:53:47,537 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 (6)] Forceful destruction successful, exit code 0 [2023-12-21 17:53:47,737 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 17:53:47,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:53:47,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:53:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash 666550211, now seen corresponding path program 3 times [2023-12-21 17:53:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:53:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101456721] [2023-12-21 17:53:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 17:53:47,738 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 17:53:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:53:47,739 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 17:53:47,740 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 17:53:47,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 17:53:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:53:47,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 17:53:47,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:53:47,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:53:47,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:53:48,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:53:48,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:53:48,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2023-12-21 17:53:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:48,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:53:52,529 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 34 treesize of output 32 [2023-12-21 17:53:52,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 270 treesize of output 262 [2023-12-21 17:53:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:53:52,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:53:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101456721] [2023-12-21 17:53:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101456721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:53:52,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:53:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-12-21 17:53:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307872988] [2023-12-21 17:53:52,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:53:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 17:53:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:53:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 17:53:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2023-12-21 17:53:52,558 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:53:56,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:54:00,685 WARN L539 Checker$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 17:54:04,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:54:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:05,403 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-12-21 17:54:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 17:54:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-21 17:54:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:05,404 INFO L225 Difference]: With dead ends: 29 [2023-12-21 17:54:05,404 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 17:54:05,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=266, Invalid=855, Unknown=1, NotChecked=0, Total=1122 [2023-12-21 17:54:05,405 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:05,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2023-12-21 17:54:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 17:54:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-12-21 17:54:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-12-21 17:54:05,410 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-12-21 17:54:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:05,410 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-12-21 17:54:05,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-12-21 17:54:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 17:54:05,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:05,410 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:05,415 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 17:54:05,615 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 17:54:05,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:05,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1568826409, now seen corresponding path program 4 times [2023-12-21 17:54:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615220672] [2023-12-21 17:54:05,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 17:54:05,616 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 17:54:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:05,617 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 17:54:05,617 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 17:54:05,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 17:54:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:54:05,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 17:54:05,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:05,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:54:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:06,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:54:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615220672] [2023-12-21 17:54:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615220672] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:54:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:54:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-21 17:54:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840654693] [2023-12-21 17:54:06,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:54:06,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 17:54:06,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:54:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 17:54:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-12-21 17:54:06,149 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:06,565 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-12-21 17:54:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 17:54:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-21 17:54:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:06,566 INFO L225 Difference]: With dead ends: 37 [2023-12-21 17:54:06,566 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 17:54:06,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-12-21 17:54:06,567 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:06,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 39 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 17:54:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 17:54:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-21 17:54:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-21 17:54:06,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-12-21 17:54:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:06,573 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-21 17:54:06,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-21 17:54:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 17:54:06,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:06,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:06,583 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 17:54:06,776 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 17:54:06,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:06,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -394621828, now seen corresponding path program 5 times [2023-12-21 17:54:06,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:06,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596972515] [2023-12-21 17:54:06,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 17:54:06,780 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 17:54:06,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:06,780 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 17:54:06,781 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 17:54:06,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 17:54:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:54:06,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 17:54:06,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:06,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:54:06,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:54:06,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:06,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:54:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:54:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:54:07,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:07,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 35 [2023-12-21 17:54:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:07,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:54:16,123 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 44 treesize of output 42 [2023-12-21 17:54:16,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37618 treesize of output 37106 [2023-12-21 17:54:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:16,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:54:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596972515] [2023-12-21 17:54:16,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596972515] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:54:16,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:54:16,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2023-12-21 17:54:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205811803] [2023-12-21 17:54:16,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:54:16,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 17:54:16,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:54:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 17:54:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=361, Unknown=2, NotChecked=0, Total=462 [2023-12-21 17:54:16,169 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:18,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:54:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:19,475 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-12-21 17:54:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 17:54:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-21 17:54:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:19,475 INFO L225 Difference]: With dead ends: 31 [2023-12-21 17:54:19,475 INFO L226 Difference]: Without dead ends: 29 [2023-12-21 17:54:19,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=350, Invalid=1130, Unknown=2, NotChecked=0, Total=1482 [2023-12-21 17:54:19,476 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:19,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-21 17:54:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-21 17:54:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-12-21 17:54:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-21 17:54:19,482 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2023-12-21 17:54:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:19,482 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-21 17:54:19,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-21 17:54:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 17:54:19,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:19,483 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:19,487 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 17:54:19,685 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 17:54:19,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:19,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash -848088880, now seen corresponding path program 6 times [2023-12-21 17:54:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:19,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855058436] [2023-12-21 17:54:19,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 17:54:19,686 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 17:54:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:19,687 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 17:54:19,687 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 17:54:19,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 17:54:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:54:19,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 17:54:19,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:20,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:54:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:20,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:54:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855058436] [2023-12-21 17:54:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855058436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:54:20,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:54:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-21 17:54:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135828058] [2023-12-21 17:54:20,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:54:20,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 17:54:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:54:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 17:54:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-12-21 17:54:20,425 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:21,004 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-12-21 17:54:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 17:54:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-21 17:54:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:21,005 INFO L225 Difference]: With dead ends: 44 [2023-12-21 17:54:21,005 INFO L226 Difference]: Without dead ends: 25 [2023-12-21 17:54:21,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 17:54:21,006 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:21,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 54 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 17:54:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-21 17:54:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-21 17:54:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-12-21 17:54:21,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2023-12-21 17:54:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:21,024 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-12-21 17:54:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-12-21 17:54:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 17:54:21,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:21,025 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:21,030 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 (10)] Ended with exit code 0 [2023-12-21 17:54:21,227 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 17:54:21,228 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:21,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1420359587, now seen corresponding path program 7 times [2023-12-21 17:54:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048345398] [2023-12-21 17:54:21,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 17:54:21,229 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 17:54:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:21,230 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 17:54:21,234 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 17:54:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:54:21,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 17:54:21,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:21,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:54:21,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:54:21,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:21,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:54:21,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:21,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:54:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:54:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:54:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:54:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:54:22,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:22,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 40 [2023-12-21 17:54:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:22,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:54:35,191 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 54 treesize of output 52 [2023-12-21 17:54:35,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 75506 treesize of output 74994 [2023-12-21 17:54:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:35,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:54:35,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048345398] [2023-12-21 17:54:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048345398] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:54:35,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:54:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-12-21 17:54:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077101444] [2023-12-21 17:54:35,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:54:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 17:54:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:54:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 17:54:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=510, Unknown=3, NotChecked=0, Total=650 [2023-12-21 17:54:35,247 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:39,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:54:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:40,896 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-12-21 17:54:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 17:54:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-21 17:54:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:40,897 INFO L225 Difference]: With dead ends: 35 [2023-12-21 17:54:40,897 INFO L226 Difference]: Without dead ends: 33 [2023-12-21 17:54:40,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=478, Invalid=1589, Unknown=3, NotChecked=0, Total=2070 [2023-12-21 17:54:40,898 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 83 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:40,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-21 17:54:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-21 17:54:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-12-21 17:54:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-12-21 17:54:40,906 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2023-12-21 17:54:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:40,908 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-12-21 17:54:40,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-12-21 17:54:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 17:54:40,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:40,908 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:40,914 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 17:54:41,111 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 17:54:41,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:41,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash -80043959, now seen corresponding path program 8 times [2023-12-21 17:54:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711292868] [2023-12-21 17:54:41,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 17:54:41,113 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 17:54:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:41,114 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 17:54:41,121 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 17:54:41,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 17:54:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:54:41,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 17:54:41,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:41,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:54:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:42,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:54:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711292868] [2023-12-21 17:54:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711292868] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:54:42,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:54:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-21 17:54:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236482013] [2023-12-21 17:54:42,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:54:42,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 17:54:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:54:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 17:54:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2023-12-21 17:54:42,089 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:54:42,949 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-12-21 17:54:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 17:54:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-21 17:54:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:54:42,950 INFO L225 Difference]: With dead ends: 51 [2023-12-21 17:54:42,950 INFO L226 Difference]: Without dead ends: 29 [2023-12-21 17:54:42,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=422, Invalid=1558, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 17:54:42,951 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 17:54:42,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 84 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 17:54:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-21 17:54:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-12-21 17:54:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-12-21 17:54:42,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2023-12-21 17:54:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:54:42,959 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-12-21 17:54:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:54:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-12-21 17:54:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 17:54:42,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:54:42,959 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-12-21 17:54:42,964 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 (12)] Ended with exit code 0 [2023-12-21 17:54:43,162 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 17:54:43,162 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:54:43,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:54:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -776288868, now seen corresponding path program 9 times [2023-12-21 17:54:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:54:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347669581] [2023-12-21 17:54:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 17:54:43,163 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 17:54:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:54:43,164 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 17:54:43,164 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 17:54:43,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-21 17:54:43,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:54:43,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-21 17:54:43,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:54:43,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:54:43,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:54:43,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:43,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:54:43,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:43,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:54:43,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:43,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 17:54:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:54:45,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:54:45,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 45 [2023-12-21 17:54:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:54:45,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:55:02,170 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 64 treesize of output 62 [2023-12-21 17:55:02,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 302578 treesize of output 301554 [2023-12-21 17:55:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:02,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:55:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347669581] [2023-12-21 17:55:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347669581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:55:02,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:55:02,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2023-12-21 17:55:02,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049033108] [2023-12-21 17:55:02,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:55:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 17:55:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:55:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 17:55:02,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=685, Unknown=4, NotChecked=0, Total=870 [2023-12-21 17:55:02,236 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:04,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:55:08,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:55:12,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:55:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:55:15,268 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-12-21 17:55:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 17:55:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-21 17:55:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:55:15,269 INFO L225 Difference]: With dead ends: 39 [2023-12-21 17:55:15,270 INFO L226 Difference]: Without dead ends: 37 [2023-12-21 17:55:15,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=624, Invalid=2128, Unknown=4, NotChecked=0, Total=2756 [2023-12-21 17:55:15,270 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-12-21 17:55:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 39 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 277 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2023-12-21 17:55:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-21 17:55:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-12-21 17:55:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-12-21 17:55:15,281 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-12-21 17:55:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:55:15,281 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-12-21 17:55:15,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-12-21 17:55:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 17:55:15,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:55:15,282 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2023-12-21 17:55:15,287 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 (13)] Ended with exit code 0 [2023-12-21 17:55:15,484 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 17:55:15,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:55:15,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:55:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1982522288, now seen corresponding path program 10 times [2023-12-21 17:55:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:55:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776294282] [2023-12-21 17:55:15,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 17:55:15,485 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 17:55:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:55:15,486 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 17:55:15,487 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 17:55:15,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 17:55:15,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:55:15,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 17:55:15,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:55:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:16,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:55:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:16,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:55:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776294282] [2023-12-21 17:55:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776294282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:55:16,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:55:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-12-21 17:55:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472890105] [2023-12-21 17:55:16,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:55:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 17:55:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:55:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 17:55:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2023-12-21 17:55:16,841 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:55:18,072 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-12-21 17:55:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 17:55:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-21 17:55:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:55:18,072 INFO L225 Difference]: With dead ends: 58 [2023-12-21 17:55:18,072 INFO L226 Difference]: Without dead ends: 33 [2023-12-21 17:55:18,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2023-12-21 17:55:18,073 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 17:55:18,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 91 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 17:55:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-21 17:55:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-12-21 17:55:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-21 17:55:18,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2023-12-21 17:55:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:55:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-21 17:55:18,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-21 17:55:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 17:55:18,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:55:18,085 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-21 17:55:18,088 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 17:55:18,287 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 17:55:18,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:55:18,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:55:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash 446834563, now seen corresponding path program 11 times [2023-12-21 17:55:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:55:18,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897741970] [2023-12-21 17:55:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 17:55:18,289 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 17:55:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:55:18,290 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 17:55:18,291 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 17:55:18,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-21 17:55:18,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:55:18,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-21 17:55:18,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:55:18,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:55:18,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:55:18,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:18,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:55:18,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:18,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:55:18,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:18,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 17:55:18,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:18,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 94 [2023-12-21 17:55:21,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:55:21,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:21,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 50 [2023-12-21 17:55:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:21,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:55:42,922 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 74 treesize of output 72 [2023-12-21 17:55:42,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2422770 treesize of output 2418674 [2023-12-21 17:55:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:43,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:55:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897741970] [2023-12-21 17:55:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897741970] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:55:43,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:55:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2023-12-21 17:55:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867106114] [2023-12-21 17:55:43,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:55:43,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 17:55:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:55:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 17:55:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=886, Unknown=5, NotChecked=0, Total=1122 [2023-12-21 17:55:43,183 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:45,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:55:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:55:49,175 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2023-12-21 17:55:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 17:55:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-21 17:55:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:55:49,177 INFO L225 Difference]: With dead ends: 43 [2023-12-21 17:55:49,177 INFO L226 Difference]: Without dead ends: 41 [2023-12-21 17:55:49,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=794, Invalid=2741, Unknown=5, NotChecked=0, Total=3540 [2023-12-21 17:55:49,178 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-21 17:55:49,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-21 17:55:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-21 17:55:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-12-21 17:55:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-12-21 17:55:49,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2023-12-21 17:55:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:55:49,192 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-12-21 17:55:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-12-21 17:55:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 17:55:49,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:55:49,193 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2023-12-21 17:55:49,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-21 17:55:49,394 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 17:55:49,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:55:49,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:55:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1550115945, now seen corresponding path program 12 times [2023-12-21 17:55:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:55:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837761173] [2023-12-21 17:55:49,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 17:55:49,396 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 17:55:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:55:49,396 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 17:55:49,398 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 17:55:49,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-21 17:55:49,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:55:49,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 17:55:49,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:55:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:50,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:55:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:51,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:55:51,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837761173] [2023-12-21 17:55:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837761173] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:55:51,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:55:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-12-21 17:55:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491005484] [2023-12-21 17:55:51,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:55:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 17:55:51,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:55:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 17:55:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 17:55:51,105 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:55:52,720 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-12-21 17:55:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 17:55:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-21 17:55:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:55:52,721 INFO L225 Difference]: With dead ends: 65 [2023-12-21 17:55:52,721 INFO L226 Difference]: Without dead ends: 37 [2023-12-21 17:55:52,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 17:55:52,722 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 17:55:52,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 121 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 17:55:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-21 17:55:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-12-21 17:55:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-12-21 17:55:52,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2023-12-21 17:55:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:55:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-12-21 17:55:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:55:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-12-21 17:55:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 17:55:52,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:55:52,738 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-12-21 17:55:52,742 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 (16)] Ended with exit code 0 [2023-12-21 17:55:52,938 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 17:55:52,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:55:52,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:55:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1457518916, now seen corresponding path program 13 times [2023-12-21 17:55:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:55:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757406445] [2023-12-21 17:55:52,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 17:55:52,939 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 17:55:52,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:55:52,940 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 17:55:52,956 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 17:55:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 17:55:53,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 17:55:53,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:55:53,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:55:53,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:55:53,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:53,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:55:53,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:53,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:55:53,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:53,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 17:55:53,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:53,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 94 [2023-12-21 17:55:53,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:53,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 110 [2023-12-21 17:55:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:55:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:55:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:55:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:55:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:55:56,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:55:56,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:55:56,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 55 [2023-12-21 17:55:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:55:56,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:56:23,132 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 84 treesize of output 82 [2023-12-21 17:56:23,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19855835122 treesize of output 19839057906 [2023-12-21 17:56:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 7 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:56:25,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:56:25,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757406445] [2023-12-21 17:56:25,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757406445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:56:25,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:56:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2023-12-21 17:56:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76100599] [2023-12-21 17:56:25,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:56:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 17:56:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:56:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 17:56:25,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1113, Unknown=6, NotChecked=0, Total=1406 [2023-12-21 17:56:25,765 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:29,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:56:32,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-21 17:56:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:56:38,509 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-12-21 17:56:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-21 17:56:38,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-21 17:56:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:56:38,512 INFO L225 Difference]: With dead ends: 47 [2023-12-21 17:56:38,512 INFO L226 Difference]: Without dead ends: 45 [2023-12-21 17:56:38,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=982, Invalid=3434, Unknown=6, NotChecked=0, Total=4422 [2023-12-21 17:56:38,514 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 106 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-21 17:56:38,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 40 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-21 17:56:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-21 17:56:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-12-21 17:56:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-12-21 17:56:38,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2023-12-21 17:56:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:56:38,543 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-12-21 17:56:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-12-21 17:56:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 17:56:38,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:56:38,544 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2023-12-21 17:56:38,549 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 (17)] Forceful destruction successful, exit code 0 [2023-12-21 17:56:38,749 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 17:56:38,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:56:38,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:56:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1178635920, now seen corresponding path program 14 times [2023-12-21 17:56:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:56:38,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410612663] [2023-12-21 17:56:38,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 17:56:38,750 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 17:56:38,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:56:38,751 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 17:56:38,751 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 17:56:38,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 17:56:38,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:56:38,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 17:56:38,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:56:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:56:39,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:56:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:56:40,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:56:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410612663] [2023-12-21 17:56:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410612663] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:56:40,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:56:40,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-21 17:56:40,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094348045] [2023-12-21 17:56:40,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:56:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 17:56:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:56:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 17:56:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 17:56:40,890 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:56:42,937 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-12-21 17:56:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-21 17:56:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-21 17:56:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:56:42,938 INFO L225 Difference]: With dead ends: 72 [2023-12-21 17:56:42,938 INFO L226 Difference]: Without dead ends: 41 [2023-12-21 17:56:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=836, Invalid=3454, Unknown=0, NotChecked=0, Total=4290 [2023-12-21 17:56:42,939 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 17:56:42,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 151 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 17:56:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-21 17:56:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-12-21 17:56:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-12-21 17:56:42,966 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2023-12-21 17:56:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:56:42,966 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-12-21 17:56:42,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:56:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-12-21 17:56:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 17:56:42,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:56:42,966 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-12-21 17:56:42,973 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 (18)] Ended with exit code 0 [2023-12-21 17:56:43,169 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 17:56:43,170 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:56:43,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:56:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1590931613, now seen corresponding path program 15 times [2023-12-21 17:56:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:56:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432699279] [2023-12-21 17:56:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 17:56:43,170 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 17:56:43,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:56:43,171 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 17:56:43,174 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 17:56:43,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-21 17:56:43,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:56:43,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-21 17:56:43,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:56:43,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:56:43,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:56:43,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:43,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:56:43,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:43,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:56:43,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:43,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 17:56:43,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:43,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 94 [2023-12-21 17:56:43,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:43,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 110 [2023-12-21 17:56:44,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:44,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 126 [2023-12-21 17:56:48,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,723 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:56:48,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:56:48,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:56:48,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 129 treesize of output 60 [2023-12-21 17:56:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:56:48,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:57:20,019 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 94 treesize of output 92 [2023-12-21 17:57:21,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19860029426 treesize of output 19851640818 [2023-12-21 17:57:27,029 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 125698 DAG size of output: 84 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 17:57:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:57:27,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:57:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432699279] [2023-12-21 17:57:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432699279] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:57:27,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:57:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2023-12-21 17:57:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783247428] [2023-12-21 17:57:27,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:57:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-21 17:57:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:57:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-21 17:57:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1366, Unknown=7, NotChecked=0, Total=1722 [2023-12-21 17:57:27,059 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:31,228 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 17:57:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:57:39,115 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-12-21 17:57:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 17:57:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-21 17:57:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:57:39,116 INFO L225 Difference]: With dead ends: 51 [2023-12-21 17:57:39,116 INFO L226 Difference]: Without dead ends: 49 [2023-12-21 17:57:39,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=1189, Invalid=4206, Unknown=7, NotChecked=0, Total=5402 [2023-12-21 17:57:39,117 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-21 17:57:39,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-12-21 17:57:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-21 17:57:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2023-12-21 17:57:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-12-21 17:57:39,142 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2023-12-21 17:57:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:57:39,142 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-12-21 17:57:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-12-21 17:57:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 17:57:39,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:57:39,143 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2023-12-21 17:57:39,149 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 (19)] Forceful destruction successful, exit code 0 [2023-12-21 17:57:39,347 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 17:57:39,347 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:57:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:57:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -474271607, now seen corresponding path program 16 times [2023-12-21 17:57:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:57:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544738513] [2023-12-21 17:57:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 17:57:39,348 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 17:57:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:57:39,349 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 17:57:39,352 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 17:57:39,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 17:57:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:57:39,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 17:57:39,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:57:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:57:40,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:57:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:57:41,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 17:57:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544738513] [2023-12-21 17:57:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544738513] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 17:57:41,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 17:57:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2023-12-21 17:57:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713513708] [2023-12-21 17:57:41,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 17:57:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-21 17:57:41,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 17:57:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-21 17:57:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 17:57:41,802 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 17:57:44,299 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-12-21 17:57:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 17:57:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-21 17:57:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 17:57:44,300 INFO L225 Difference]: With dead ends: 79 [2023-12-21 17:57:44,300 INFO L226 Difference]: Without dead ends: 45 [2023-12-21 17:57:44,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1004, Invalid=4252, Unknown=0, NotChecked=0, Total=5256 [2023-12-21 17:57:44,301 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 17:57:44,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 160 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 17:57:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-21 17:57:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-12-21 17:57:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-21 17:57:44,327 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2023-12-21 17:57:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 17:57:44,327 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-21 17:57:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 17:57:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-21 17:57:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 17:57:44,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 17:57:44,328 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-12-21 17:57:44,333 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 17:57:44,531 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 17:57:44,531 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 17:57:44,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 17:57:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1852067804, now seen corresponding path program 17 times [2023-12-21 17:57:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 17:57:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364806620] [2023-12-21 17:57:44,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 17:57:44,532 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 17:57:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 17:57:44,533 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 17:57:44,533 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 17:57:44,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-21 17:57:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 17:57:44,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-21 17:57:44,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 17:57:44,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 17:57:44,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 17:57:44,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:44,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 17:57:44,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:44,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 17:57:45,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:45,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 17:57:45,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:45,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 94 [2023-12-21 17:57:45,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:45,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 110 [2023-12-21 17:57:45,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:45,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 126 [2023-12-21 17:57:45,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:45,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 142 [2023-12-21 17:57:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:57:51,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 17:57:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 17:57:51,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 17:57:51,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 142 treesize of output 65 [2023-12-21 17:57:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 8 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 17:57:51,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 17:58:27,643 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 104 treesize of output 102 [2023-12-21 17:58:44,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 81355270520818 treesize of output 81338090651634 [2023-12-21 18:01:23,447 WARN L293 SmtUtils]: Spent 2.61m on a formula simplification. DAG size of input: 780719 DAG size of output: 93 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 18:01:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 18:01:23,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 18:01:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364806620] [2023-12-21 18:01:23,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364806620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 18:01:23,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 18:01:23,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2023-12-21 18:01:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317838440] [2023-12-21 18:01:23,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 18:01:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-21 18:01:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 18:01:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-21 18:01:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1645, Unknown=8, NotChecked=0, Total=2070 [2023-12-21 18:01:23,491 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 18:01:35,309 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2023-12-21 18:01:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 18:01:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-21 18:01:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 18:01:35,310 INFO L225 Difference]: With dead ends: 55 [2023-12-21 18:01:35,310 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 18:01:35,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=1418, Invalid=5054, Unknown=8, NotChecked=0, Total=6480 [2023-12-21 18:01:35,311 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-21 18:01:35,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 56 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-21 18:01:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 18:01:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-12-21 18:01:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-21 18:01:35,347 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2023-12-21 18:01:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 18:01:35,347 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-21 18:01:35,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-21 18:01:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 18:01:35,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 18:01:35,349 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2023-12-21 18:01:35,357 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 (21)] Forceful destruction successful, exit code 0 [2023-12-21 18:01:35,554 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 18:01:35,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 18:01:35,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 18:01:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1807364464, now seen corresponding path program 18 times [2023-12-21 18:01:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 18:01:35,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285672480] [2023-12-21 18:01:35,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 18:01:35,556 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 18:01:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 18:01:35,557 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 18:01:35,588 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 (22)] Waiting until timeout for monitored process [2023-12-21 18:01:35,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-21 18:01:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 18:01:35,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 18:01:35,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 18:01:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 18:01:36,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 18:01:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 18:01:38,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-21 18:01:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285672480] [2023-12-21 18:01:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285672480] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 18:01:38,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 18:01:38,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-21 18:01:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383193135] [2023-12-21 18:01:38,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 18:01:38,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-21 18:01:38,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-21 18:01:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-21 18:01:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 18:01:38,853 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 18:01:42,270 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-12-21 18:01:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-21 18:01:42,270 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-21 18:01:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 18:01:42,270 INFO L225 Difference]: With dead ends: 86 [2023-12-21 18:01:42,270 INFO L226 Difference]: Without dead ends: 49 [2023-12-21 18:01:42,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1187, Invalid=5133, Unknown=0, NotChecked=0, Total=6320 [2023-12-21 18:01:42,272 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 18:01:42,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 236 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 18:01:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-21 18:01:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-12-21 18:01:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-12-21 18:01:42,306 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2023-12-21 18:01:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 18:01:42,306 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-12-21 18:01:42,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 18:01:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-12-21 18:01:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 18:01:42,307 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 18:01:42,307 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-21 18:01:42,315 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 18:01:42,507 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 18:01:42,507 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 18:01:42,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 18:01:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 860712771, now seen corresponding path program 19 times [2023-12-21 18:01:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-21 18:01:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767090964] [2023-12-21 18:01:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 18:01:42,508 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 18:01:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-21 18:01:42,509 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 18:01:42,539 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 (23)] Waiting until timeout for monitored process [2023-12-21 18:01:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 18:01:42,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-21 18:01:42,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 18:01:42,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-21 18:01:42,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-21 18:01:42,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:42,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2023-12-21 18:01:42,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:42,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 62 [2023-12-21 18:01:43,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:43,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 78 [2023-12-21 18:01:43,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:43,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 94 [2023-12-21 18:01:43,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:43,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 110 [2023-12-21 18:01:43,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:43,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 126 [2023-12-21 18:01:43,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:43,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 142 [2023-12-21 18:01:44,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:44,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 55 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 150 treesize of output 158 [2023-12-21 18:01:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 18:01:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 18:01:52,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 18:01:52,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 70 [2023-12-21 18:01:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 9 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 18:01:52,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 18:02:34,969 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 114 treesize of output 112