/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_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-patterns/array5_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 09:40:27,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 09:40:27,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 09:40:27,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 09:40:27,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 09:40:27,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 09:40:27,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 09:40:27,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 09:40:27,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 09:40:27,498 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 09:40:27,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 09:40:27,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 09:40:27,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 09:40:27,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 09:40:27,499 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 09:40:27,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 09:40:27,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 09:40:27,500 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 09:40:27,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 09:40:27,500 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 09:40:27,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 09:40:27,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 09:40:27,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 09:40:27,501 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 09:40:27,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 09:40:27,502 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 09:40:27,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 09:40:27,502 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 09:40:27,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 09:40:27,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 09:40:27,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 09:40:27,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 09:40:27,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:40:27,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 09:40:27,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 09:40:27,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 09:40:27,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 09:40:27,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 09:40:27,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 09:40:27,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 09:40:27,505 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 09:40:27,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 09:40:27,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 09:40:27,508 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 09:40:27,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 09:40:27,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 09:40:27,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 09:40:27,698 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 09:40:27,699 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 09:40:27,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array5_pattern.c [2023-12-20 09:40:28,731 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 09:40:28,896 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 09:40:28,900 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array5_pattern.c [2023-12-20 09:40:28,909 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90512c694/292293c5b02e475f88a60c0de9dd85a9/FLAGfb4689796 [2023-12-20 09:40:28,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90512c694/292293c5b02e475f88a60c0de9dd85a9 [2023-12-20 09:40:28,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 09:40:28,929 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 09:40:28,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 09:40:28,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 09:40:28,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 09:40:28,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:40:28" (1/1) ... [2023-12-20 09:40:28,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fec3845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:28, skipping insertion in model container [2023-12-20 09:40:28,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:40:28" (1/1) ... [2023-12-20 09:40:28,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 09:40:29,055 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array5_pattern.c[1890,1903] [2023-12-20 09:40:29,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:40:29,072 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 09:40:29,079 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array5_pattern.c[1890,1903] [2023-12-20 09:40:29,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:40:29,095 INFO L206 MainTranslator]: Completed translation [2023-12-20 09:40:29,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29 WrapperNode [2023-12-20 09:40:29,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 09:40:29,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 09:40:29,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 09:40:29,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 09:40:29,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,118 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-12-20 09:40:29,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 09:40:29,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 09:40:29,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 09:40:29,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 09:40:29,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,152 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2023-12-20 09:40:29,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 09:40:29,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 09:40:29,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 09:40:29,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 09:40:29,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (1/1) ... [2023-12-20 09:40:29,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:40:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:29,193 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) [2023-12-20 09:40:29,214 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 [2023-12-20 09:40:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 09:40:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-20 09:40:29,225 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-20 09:40:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 09:40:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 09:40:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 09:40:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 09:40:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 09:40:29,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 09:40:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 09:40:29,286 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 09:40:29,288 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 09:40:29,395 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 09:40:29,414 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 09:40:29,414 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 09:40:29,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:40:29 BoogieIcfgContainer [2023-12-20 09:40:29,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 09:40:29,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 09:40:29,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 09:40:29,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 09:40:29,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 09:40:28" (1/3) ... [2023-12-20 09:40:29,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fdaa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:40:29, skipping insertion in model container [2023-12-20 09:40:29,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:40:29" (2/3) ... [2023-12-20 09:40:29,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fdaa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:40:29, skipping insertion in model container [2023-12-20 09:40:29,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:40:29" (3/3) ... [2023-12-20 09:40:29,420 INFO L112 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2023-12-20 09:40:29,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 09:40:29,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 09:40:29,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 09:40:29,461 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;@3468053e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 09:40:29,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 09:40:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 09:40:29,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:29,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:29,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:29,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1117162808, now seen corresponding path program 1 times [2023-12-20 09:40:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:29,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417842537] [2023-12-20 09:40:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:29,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:40:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417842537] [2023-12-20 09:40:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417842537] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:40:29,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:40:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 09:40:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598404080] [2023-12-20 09:40:29,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:40:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 09:40:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 09:40:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 09:40:29,610 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-20 09:40:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:29,653 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2023-12-20 09:40:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 09:40:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-20 09:40:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:29,661 INFO L225 Difference]: With dead ends: 44 [2023-12-20 09:40:29,661 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 09:40:29,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 09:40:29,665 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2023-12-20 09:40:29,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:40:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 09:40:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 09:40:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-12-20 09:40:29,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2023-12-20 09:40:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:29,692 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-12-20 09:40:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-20 09:40:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-12-20 09:40:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 09:40:29,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:29,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 09:40:29,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:29,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1293017300, now seen corresponding path program 1 times [2023-12-20 09:40:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:29,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303948224] [2023-12-20 09:40:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:29,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:29,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348531380] [2023-12-20 09:40:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:29,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:29,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:29,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 09:40:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:29,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 09:40:29,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:40:29,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:40:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:29,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303948224] [2023-12-20 09:40:29,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:29,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348531380] [2023-12-20 09:40:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348531380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:40:29,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:40:29,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 09:40:29,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177609843] [2023-12-20 09:40:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:40:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 09:40:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 09:40:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 09:40:29,868 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:29,894 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-12-20 09:40:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 09:40:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-20 09:40:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:29,895 INFO L225 Difference]: With dead ends: 49 [2023-12-20 09:40:29,895 INFO L226 Difference]: Without dead ends: 33 [2023-12-20 09:40:29,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 09:40:29,896 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:29,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:40:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-20 09:40:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-12-20 09:40:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-20 09:40:29,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24 [2023-12-20 09:40:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:29,902 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-20 09:40:29,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-20 09:40:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 09:40:29,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:29,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:29,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:30,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:30,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2102363926, now seen corresponding path program 1 times [2023-12-20 09:40:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708407197] [2023-12-20 09:40:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:30,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27475110] [2023-12-20 09:40:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:30,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:30,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 09:40:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:30,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 09:40:30,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:40:30,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:40:30,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708407197] [2023-12-20 09:40:30,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27475110] [2023-12-20 09:40:30,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27475110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:40:30,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:40:30,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 09:40:30,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951349861] [2023-12-20 09:40:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:40:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 09:40:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 09:40:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 09:40:30,234 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:30,250 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2023-12-20 09:40:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 09:40:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-20 09:40:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:30,251 INFO L225 Difference]: With dead ends: 30 [2023-12-20 09:40:30,251 INFO L226 Difference]: Without dead ends: 26 [2023-12-20 09:40:30,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 09:40:30,252 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:30,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:40:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-20 09:40:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-20 09:40:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-20 09:40:30,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 24 [2023-12-20 09:40:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:30,256 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-20 09:40:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-20 09:40:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 09:40:30,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:30,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:30,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:30,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-20 09:40:30,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:30,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash -722231353, now seen corresponding path program 1 times [2023-12-20 09:40:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048296842] [2023-12-20 09:40:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:30,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:30,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926190659] [2023-12-20 09:40:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:30,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:30,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 09:40:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:30,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 09:40:30,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:30,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:40:30,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:30,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048296842] [2023-12-20 09:40:30,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926190659] [2023-12-20 09:40:30,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926190659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:40:30,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:40:30,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 09:40:30,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250631138] [2023-12-20 09:40:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:40:30,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 09:40:30,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 09:40:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 09:40:30,629 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:30,683 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-12-20 09:40:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 09:40:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-12-20 09:40:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:30,684 INFO L225 Difference]: With dead ends: 51 [2023-12-20 09:40:30,684 INFO L226 Difference]: Without dead ends: 28 [2023-12-20 09:40:30,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-20 09:40:30,685 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:30,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:40:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-20 09:40:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-12-20 09:40:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-20 09:40:30,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 25 [2023-12-20 09:40:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:30,689 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-20 09:40:30,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-20 09:40:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 09:40:30,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:30,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:30,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-20 09:40:30,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:30,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:30,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash -349300913, now seen corresponding path program 1 times [2023-12-20 09:40:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537203377] [2023-12-20 09:40:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:30,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:30,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010632132] [2023-12-20 09:40:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:30,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:30,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:30,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 09:40:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:30,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-20 09:40:30,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:31,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-20 09:40:31,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:31,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:31,357 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 33 treesize of output 31 [2023-12-20 09:40:31,360 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 31 treesize of output 29 [2023-12-20 09:40:31,366 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 49 treesize of output 47 [2023-12-20 09:40:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:40:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537203377] [2023-12-20 09:40:31,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010632132] [2023-12-20 09:40:31,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010632132] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:40:31,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:40:31,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-12-20 09:40:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795941693] [2023-12-20 09:40:31,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:31,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 09:40:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 09:40:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-12-20 09:40:31,714 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 09:40:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:32,396 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2023-12-20 09:40:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 09:40:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-20 09:40:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:32,397 INFO L225 Difference]: With dead ends: 101 [2023-12-20 09:40:32,397 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 09:40:32,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=1983, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:40:32,399 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:32,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 224 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:40:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 09:40:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-12-20 09:40:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-20 09:40:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-12-20 09:40:32,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 26 [2023-12-20 09:40:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:32,406 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-12-20 09:40:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 09:40:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-12-20 09:40:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 09:40:32,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:32,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:32,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 09:40:32,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:32,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:32,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1673359161, now seen corresponding path program 2 times [2023-12-20 09:40:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:32,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529426412] [2023-12-20 09:40:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:32,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:32,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573324014] [2023-12-20 09:40:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:40:32,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:32,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:32,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:32,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 09:40:32,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:40:32,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:32,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 09:40:32,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:32,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:40:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529426412] [2023-12-20 09:40:32,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573324014] [2023-12-20 09:40:32,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573324014] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:40:32,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:40:32,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 09:40:32,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709717145] [2023-12-20 09:40:32,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 09:40:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 09:40:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 09:40:32,783 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:32,960 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2023-12-20 09:40:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 09:40:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-20 09:40:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:32,962 INFO L225 Difference]: With dead ends: 84 [2023-12-20 09:40:32,962 INFO L226 Difference]: Without dead ends: 59 [2023-12-20 09:40:32,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:40:32,962 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:32,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 57 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:40:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-20 09:40:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2023-12-20 09:40:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-12-20 09:40:32,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 27 [2023-12-20 09:40:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:32,968 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-12-20 09:40:32,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-12-20 09:40:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 09:40:32,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:32,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:32,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:33,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:33,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:33,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash -307985526, now seen corresponding path program 3 times [2023-12-20 09:40:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633085530] [2023-12-20 09:40:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:33,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:33,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:33,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343919438] [2023-12-20 09:40:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:40:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:33,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 09:40:33,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 09:40:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:33,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 09:40:33,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:33,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:33,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:33,499 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 09:40:33,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-20 09:40:33,507 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 09:40:33,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-12-20 09:40:33,760 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-12-20 09:40:33,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 27 [2023-12-20 09:40:33,773 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-12-20 09:40:33,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 30 [2023-12-20 09:40:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:33,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:34,511 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 36 treesize of output 34 [2023-12-20 09:40:34,513 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 [2023-12-20 09:40:34,515 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 55 treesize of output 51 [2023-12-20 09:40:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:40:34,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633085530] [2023-12-20 09:40:34,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343919438] [2023-12-20 09:40:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343919438] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:40:34,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:40:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-12-20 09:40:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313002157] [2023-12-20 09:40:34,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:34,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:40:34,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:40:34,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-12-20 09:40:34,578 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:38,502 INFO L93 Difference]: Finished difference Result 183 states and 243 transitions. [2023-12-20 09:40:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-20 09:40:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-20 09:40:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:38,504 INFO L225 Difference]: With dead ends: 183 [2023-12-20 09:40:38,504 INFO L226 Difference]: Without dead ends: 153 [2023-12-20 09:40:38,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=879, Invalid=4671, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 09:40:38,522 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 204 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:38,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 338 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 09:40:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-20 09:40:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 91. [2023-12-20 09:40:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 76 states have internal predecessors, (102), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-20 09:40:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2023-12-20 09:40:38,548 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 28 [2023-12-20 09:40:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:38,549 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2023-12-20 09:40:38,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:40:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2023-12-20 09:40:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 09:40:38,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:38,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:38,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:38,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 393079052, now seen corresponding path program 1 times [2023-12-20 09:40:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343051644] [2023-12-20 09:40:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:38,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268649985] [2023-12-20 09:40:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:38,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:38,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:38,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:38,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 09:40:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:38,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-20 09:40:38,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:38,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:38,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:38,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:38,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:39,213 INFO L349 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2023-12-20 09:40:39,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 68 [2023-12-20 09:40:39,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:39,242 INFO L349 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2023-12-20 09:40:39,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 66 [2023-12-20 09:40:39,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:39,631 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 99 treesize of output 97 [2023-12-20 09:40:39,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:39,644 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 84 treesize of output 82 [2023-12-20 09:40:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:39,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343051644] [2023-12-20 09:40:40,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268649985] [2023-12-20 09:40:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268649985] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:40:40,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:40:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-20 09:40:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381581267] [2023-12-20 09:40:40,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 09:40:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 09:40:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-12-20 09:40:40,057 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:40,576 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2023-12-20 09:40:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 09:40:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-20 09:40:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:40,577 INFO L225 Difference]: With dead ends: 107 [2023-12-20 09:40:40,577 INFO L226 Difference]: Without dead ends: 103 [2023-12-20 09:40:40,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:40:40,578 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:40,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 125 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:40:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-20 09:40:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-12-20 09:40:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.32) internal successors, (99), 76 states have internal predecessors, (99), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-20 09:40:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2023-12-20 09:40:40,591 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 28 [2023-12-20 09:40:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:40,592 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2023-12-20 09:40:40,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2023-12-20 09:40:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 09:40:40,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:40,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:40,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:40,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:40,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:40,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash -931075801, now seen corresponding path program 4 times [2023-12-20 09:40:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:40,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096233941] [2023-12-20 09:40:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:40,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:40,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:40,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955310904] [2023-12-20 09:40:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:40:40,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:40,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:40,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 09:40:40,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:40:40,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:40,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 09:40:40,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:40,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:40:40,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096233941] [2023-12-20 09:40:40,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955310904] [2023-12-20 09:40:40,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955310904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:40:40,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:40:40,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 09:40:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850407871] [2023-12-20 09:40:40,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 09:40:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 09:40:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:40:40,959 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:41,213 INFO L93 Difference]: Finished difference Result 273 states and 366 transitions. [2023-12-20 09:40:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 09:40:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-20 09:40:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:41,217 INFO L225 Difference]: With dead ends: 273 [2023-12-20 09:40:41,217 INFO L226 Difference]: Without dead ends: 204 [2023-12-20 09:40:41,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-20 09:40:41,220 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 138 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:40:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-20 09:40:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 157. [2023-12-20 09:40:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 132 states have internal predecessors, (167), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-20 09:40:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2023-12-20 09:40:41,263 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 29 [2023-12-20 09:40:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:41,263 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2023-12-20 09:40:41,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2023-12-20 09:40:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 09:40:41,264 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:41,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:41,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:41,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-20 09:40:41,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:41,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash -970695505, now seen corresponding path program 5 times [2023-12-20 09:40:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:41,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884320590] [2023-12-20 09:40:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:41,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:41,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935786212] [2023-12-20 09:40:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:40:41,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:41,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:41,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 09:40:41,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 09:40:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:41,548 WARN L260 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-20 09:40:41,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:41,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:41,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:41,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:41,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:41,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:41,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:41,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:41,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:42,087 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-12-20 09:40:42,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 56 treesize of output 86 [2023-12-20 09:40:42,131 INFO L349 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2023-12-20 09:40:42,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 56 treesize of output 88 [2023-12-20 09:40:42,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:42,744 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 141 treesize of output 115 [2023-12-20 09:40:42,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:42,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 86 [2023-12-20 09:40:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:42,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884320590] [2023-12-20 09:40:43,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935786212] [2023-12-20 09:40:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935786212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:40:43,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:40:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-20 09:40:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611815859] [2023-12-20 09:40:43,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:43,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 09:40:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 09:40:43,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-12-20 09:40:43,185 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:44,020 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2023-12-20 09:40:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 09:40:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-20 09:40:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:44,021 INFO L225 Difference]: With dead ends: 179 [2023-12-20 09:40:44,021 INFO L226 Difference]: Without dead ends: 175 [2023-12-20 09:40:44,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 09:40:44,022 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:44,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 208 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:40:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-20 09:40:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2023-12-20 09:40:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.286764705882353) internal successors, (175), 137 states have internal predecessors, (175), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-20 09:40:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2023-12-20 09:40:44,055 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 30 [2023-12-20 09:40:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:44,056 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2023-12-20 09:40:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2023-12-20 09:40:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 09:40:44,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:44,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:44,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:44,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 09:40:44,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:44,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash -712530067, now seen corresponding path program 2 times [2023-12-20 09:40:44,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:44,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383575701] [2023-12-20 09:40:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:44,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:44,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507762874] [2023-12-20 09:40:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:40:44,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:44,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:44,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 09:40:44,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:40:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:44,347 WARN L260 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-20 09:40:44,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:44,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:44,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:44,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:44,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:44,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:44,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:44,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:44,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:44,871 INFO L349 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2023-12-20 09:40:44,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 60 treesize of output 88 [2023-12-20 09:40:44,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:40:44,945 INFO L349 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2023-12-20 09:40:44,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 60 treesize of output 86 [2023-12-20 09:40:45,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:45,518 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 106 treesize of output 112 [2023-12-20 09:40:45,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:45,535 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 91 treesize of output 97 [2023-12-20 09:40:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:45,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:45,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383575701] [2023-12-20 09:40:45,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507762874] [2023-12-20 09:40:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507762874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:40:45,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:40:45,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-20 09:40:45,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842828673] [2023-12-20 09:40:45,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 09:40:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 09:40:45,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-12-20 09:40:45,913 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:46,918 INFO L93 Difference]: Finished difference Result 183 states and 237 transitions. [2023-12-20 09:40:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 09:40:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-20 09:40:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:46,920 INFO L225 Difference]: With dead ends: 183 [2023-12-20 09:40:46,920 INFO L226 Difference]: Without dead ends: 179 [2023-12-20 09:40:46,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 09:40:46,921 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:46,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:40:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-20 09:40:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2023-12-20 09:40:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 140 states have internal predecessors, (179), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-20 09:40:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2023-12-20 09:40:46,952 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 30 [2023-12-20 09:40:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:46,952 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2023-12-20 09:40:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2023-12-20 09:40:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 09:40:46,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:46,953 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:46,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 09:40:47,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:47,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -248670, now seen corresponding path program 6 times [2023-12-20 09:40:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958409632] [2023-12-20 09:40:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:47,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096830059] [2023-12-20 09:40:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:40:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:47,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:47,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 09:40:47,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 09:40:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:47,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 09:40:47,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:47,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:40:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958409632] [2023-12-20 09:40:47,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096830059] [2023-12-20 09:40:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096830059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:40:47,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:40:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-20 09:40:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699686420] [2023-12-20 09:40:47,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 09:40:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 09:40:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-20 09:40:47,382 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:47,892 INFO L93 Difference]: Finished difference Result 497 states and 657 transitions. [2023-12-20 09:40:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 09:40:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-20 09:40:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:47,895 INFO L225 Difference]: With dead ends: 497 [2023-12-20 09:40:47,895 INFO L226 Difference]: Without dead ends: 360 [2023-12-20 09:40:47,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2023-12-20 09:40:47,896 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 227 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:47,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 131 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:40:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-20 09:40:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 291. [2023-12-20 09:40:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 246 states have (on average 1.3089430894308942) internal successors, (322), 247 states have internal predecessors, (322), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-20 09:40:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 390 transitions. [2023-12-20 09:40:47,937 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 390 transitions. Word has length 31 [2023-12-20 09:40:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:47,938 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 390 transitions. [2023-12-20 09:40:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:40:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 390 transitions. [2023-12-20 09:40:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:40:47,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:47,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:47,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:48,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 09:40:48,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:48,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 579921450, now seen corresponding path program 7 times [2023-12-20 09:40:48,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811262207] [2023-12-20 09:40:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:48,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:48,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409918781] [2023-12-20 09:40:48,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:40:48,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:48,154 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:48,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 09:40:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:40:48,273 WARN L260 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-20 09:40:48,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:48,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:48,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:48,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:48,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:48,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:48,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:48,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:48,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:48,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:48,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:40:48,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:48,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:40:48,782 INFO L349 Elim1Store]: treesize reduction 48, result has 48.4 percent of original size [2023-12-20 09:40:48,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2023-12-20 09:40:48,819 INFO L349 Elim1Store]: treesize reduction 56, result has 44.6 percent of original size [2023-12-20 09:40:48,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2023-12-20 09:40:50,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:50,250 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 294 treesize of output 240 [2023-12-20 09:40:50,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:50,271 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 211 treesize of output 165 [2023-12-20 09:40:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:40:51,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:40:57,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:40:57,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811262207] [2023-12-20 09:40:57,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:40:57,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409918781] [2023-12-20 09:40:57,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409918781] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:40:57,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:40:57,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-20 09:40:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694240887] [2023-12-20 09:40:57,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:40:57,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 09:40:57,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:40:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 09:40:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-12-20 09:40:57,981 INFO L87 Difference]: Start difference. First operand 291 states and 390 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:40:59,428 INFO L93 Difference]: Finished difference Result 310 states and 412 transitions. [2023-12-20 09:40:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 09:40:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-20 09:40:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:40:59,429 INFO L225 Difference]: With dead ends: 310 [2023-12-20 09:40:59,429 INFO L226 Difference]: Without dead ends: 306 [2023-12-20 09:40:59,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:40:59,431 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:40:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 207 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:40:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-20 09:40:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 293. [2023-12-20 09:40:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 248 states have (on average 1.3064516129032258) internal successors, (324), 249 states have internal predecessors, (324), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-20 09:40:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 392 transitions. [2023-12-20 09:40:59,474 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 392 transitions. Word has length 32 [2023-12-20 09:40:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:40:59,474 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 392 transitions. [2023-12-20 09:40:59,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:40:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 392 transitions. [2023-12-20 09:40:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:40:59,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:40:59,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:40:59,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 09:40:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 09:40:59,680 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:40:59,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:40:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash -6884564, now seen corresponding path program 3 times [2023-12-20 09:40:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:40:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872837740] [2023-12-20 09:40:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:40:59,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:40:59,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:40:59,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371456155] [2023-12-20 09:40:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:40:59,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:40:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:40:59,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:40:59,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 09:40:59,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 09:40:59,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:40:59,794 WARN L260 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-20 09:40:59,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:40:59,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:59,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:40:59,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:59,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:40:59,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:59,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:59,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:40:59,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:40:59,975 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-12-20 09:40:59,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 40 [2023-12-20 09:41:00,002 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-12-20 09:41:00,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 40 [2023-12-20 09:41:00,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,523 INFO L349 Elim1Store]: treesize reduction 219, result has 22.1 percent of original size [2023-12-20 09:41:00,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 82 treesize of output 129 [2023-12-20 09:41:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:00,601 INFO L349 Elim1Store]: treesize reduction 211, result has 22.7 percent of original size [2023-12-20 09:41:00,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 82 treesize of output 127 [2023-12-20 09:41:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:02,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 198 treesize of output 213 [2023-12-20 09:41:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:02,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:02,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 182 [2023-12-20 09:41:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:03,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872837740] [2023-12-20 09:41:04,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371456155] [2023-12-20 09:41:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371456155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:04,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-20 09:41:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63299603] [2023-12-20 09:41:04,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:41:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:41:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-12-20 09:41:04,186 INFO L87 Difference]: Start difference. First operand 293 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:05,307 INFO L93 Difference]: Finished difference Result 314 states and 418 transitions. [2023-12-20 09:41:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 09:41:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-20 09:41:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:05,309 INFO L225 Difference]: With dead ends: 314 [2023-12-20 09:41:05,309 INFO L226 Difference]: Without dead ends: 310 [2023-12-20 09:41:05,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:41:05,310 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:05,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 255 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:41:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-12-20 09:41:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 292. [2023-12-20 09:41:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 247 states have (on average 1.3076923076923077) internal successors, (323), 248 states have internal predecessors, (323), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-20 09:41:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 391 transitions. [2023-12-20 09:41:05,364 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 391 transitions. Word has length 32 [2023-12-20 09:41:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:05,364 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 391 transitions. [2023-12-20 09:41:05,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 391 transitions. [2023-12-20 09:41:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 09:41:05,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:05,365 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:05,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-20 09:41:05,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 09:41:05,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:05,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 824236679, now seen corresponding path program 8 times [2023-12-20 09:41:05,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:05,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268044280] [2023-12-20 09:41:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:05,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:05,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:05,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917145072] [2023-12-20 09:41:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:41:05,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:05,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:05,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 09:41:05,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:41:05,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:05,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 09:41:05,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:05,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:41:05,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:05,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268044280] [2023-12-20 09:41:05,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:05,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917145072] [2023-12-20 09:41:05,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917145072] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:41:05,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:41:05,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-20 09:41:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604400129] [2023-12-20 09:41:05,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:05,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 09:41:05,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 09:41:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-20 09:41:05,839 INFO L87 Difference]: Start difference. First operand 292 states and 391 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:06,675 INFO L93 Difference]: Finished difference Result 848 states and 1136 transitions. [2023-12-20 09:41:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 09:41:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-12-20 09:41:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:06,679 INFO L225 Difference]: With dead ends: 848 [2023-12-20 09:41:06,679 INFO L226 Difference]: Without dead ends: 600 [2023-12-20 09:41:06,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2023-12-20 09:41:06,681 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 332 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:06,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 204 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 09:41:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-12-20 09:41:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 447. [2023-12-20 09:41:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 380 states have (on average 1.3210526315789475) internal successors, (502), 381 states have internal predecessors, (502), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2023-12-20 09:41:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 608 transitions. [2023-12-20 09:41:06,786 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 608 transitions. Word has length 33 [2023-12-20 09:41:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:06,786 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 608 transitions. [2023-12-20 09:41:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 608 transitions. [2023-12-20 09:41:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 09:41:06,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:06,787 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:06,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-20 09:41:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:06,992 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:06,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash 21973519, now seen corresponding path program 9 times [2023-12-20 09:41:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875160055] [2023-12-20 09:41:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:07,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:07,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776470854] [2023-12-20 09:41:07,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:41:07,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:07,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:07,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 09:41:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 09:41:07,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:07,183 WARN L260 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-20 09:41:07,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:07,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:07,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:07,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:07,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:07,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:07,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:07,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:07,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:07,341 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-12-20 09:41:07,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2023-12-20 09:41:07,373 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-12-20 09:41:07,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2023-12-20 09:41:07,444 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2023-12-20 09:41:07,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 54 [2023-12-20 09:41:07,474 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2023-12-20 09:41:07,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 54 [2023-12-20 09:41:08,306 INFO L349 Elim1Store]: treesize reduction 464, result has 19.6 percent of original size [2023-12-20 09:41:08,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 5 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 53 case distinctions, treesize of input 100 treesize of output 168 [2023-12-20 09:41:08,444 INFO L349 Elim1Store]: treesize reduction 448, result has 20.1 percent of original size [2023-12-20 09:41:08,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 5 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 53 case distinctions, treesize of input 100 treesize of output 166 [2023-12-20 09:41:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,594 INFO L349 Elim1Store]: treesize reduction 52, result has 72.5 percent of original size [2023-12-20 09:41:11,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 393 treesize of output 407 [2023-12-20 09:41:11,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:11,783 INFO L349 Elim1Store]: treesize reduction 56, result has 70.4 percent of original size [2023-12-20 09:41:11,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 314 treesize of output 292 [2023-12-20 09:41:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:19,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875160055] [2023-12-20 09:41:21,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776470854] [2023-12-20 09:41:21,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776470854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:21,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:21,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-20 09:41:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405513140] [2023-12-20 09:41:21,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:21,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 09:41:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 09:41:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 09:41:21,299 INFO L87 Difference]: Start difference. First operand 447 states and 608 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:22,787 INFO L93 Difference]: Finished difference Result 474 states and 642 transitions. [2023-12-20 09:41:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 09:41:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-12-20 09:41:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:22,792 INFO L225 Difference]: With dead ends: 474 [2023-12-20 09:41:22,792 INFO L226 Difference]: Without dead ends: 470 [2023-12-20 09:41:22,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 09:41:22,793 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:22,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 250 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 09:41:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-12-20 09:41:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 449. [2023-12-20 09:41:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 382 states have (on average 1.3193717277486912) internal successors, (504), 383 states have internal predecessors, (504), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2023-12-20 09:41:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 610 transitions. [2023-12-20 09:41:22,862 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 610 transitions. Word has length 34 [2023-12-20 09:41:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:22,863 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 610 transitions. [2023-12-20 09:41:22,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 610 transitions. [2023-12-20 09:41:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 09:41:22,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:22,863 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:22,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-20 09:41:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 09:41:23,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:23,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -989143731, now seen corresponding path program 4 times [2023-12-20 09:41:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913436931] [2023-12-20 09:41:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:23,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437427268] [2023-12-20 09:41:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:41:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:23,079 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:23,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 09:41:23,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:41:23,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:23,263 WARN L260 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-20 09:41:23,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:23,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:23,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:23,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:23,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:23,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:23,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:23,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:23,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:23,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:23,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,094 INFO L349 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2023-12-20 09:41:24,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 88 treesize of output 138 [2023-12-20 09:41:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:24,167 INFO L349 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2023-12-20 09:41:24,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 88 treesize of output 140 [2023-12-20 09:41:24,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:24,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 72 [2023-12-20 09:41:24,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:24,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 41 [2023-12-20 09:41:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:25,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:27,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:27,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913436931] [2023-12-20 09:41:27,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:27,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437427268] [2023-12-20 09:41:27,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437427268] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:27,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:27,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-20 09:41:27,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690643947] [2023-12-20 09:41:27,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:27,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 09:41:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 09:41:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 09:41:27,989 INFO L87 Difference]: Start difference. First operand 449 states and 610 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:29,034 INFO L93 Difference]: Finished difference Result 489 states and 656 transitions. [2023-12-20 09:41:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 09:41:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-12-20 09:41:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:29,036 INFO L225 Difference]: With dead ends: 489 [2023-12-20 09:41:29,036 INFO L226 Difference]: Without dead ends: 485 [2023-12-20 09:41:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 09:41:29,049 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:29,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 270 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:41:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-12-20 09:41:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 461. [2023-12-20 09:41:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 392 states have (on average 1.3188775510204083) internal successors, (517), 393 states have internal predecessors, (517), 54 states have call successors, (54), 14 states have call predecessors, (54), 14 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-20 09:41:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 625 transitions. [2023-12-20 09:41:29,123 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 625 transitions. Word has length 34 [2023-12-20 09:41:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:29,123 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 625 transitions. [2023-12-20 09:41:29,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 625 transitions. [2023-12-20 09:41:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 09:41:29,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:29,124 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:29,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 09:41:29,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:29,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 707720002, now seen corresponding path program 10 times [2023-12-20 09:41:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:29,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508660706] [2023-12-20 09:41:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:29,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:29,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:29,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337206183] [2023-12-20 09:41:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:41:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:29,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:29,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 09:41:29,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:41:29,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:29,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 09:41:29,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:29,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:41:29,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:29,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508660706] [2023-12-20 09:41:29,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:29,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337206183] [2023-12-20 09:41:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337206183] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:41:29,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:41:29,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-20 09:41:29,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426494005] [2023-12-20 09:41:29,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:29,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:41:29,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:41:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-20 09:41:29,643 INFO L87 Difference]: Start difference. First operand 461 states and 625 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:30,794 INFO L93 Difference]: Finished difference Result 1312 states and 1773 transitions. [2023-12-20 09:41:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 09:41:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 09:41:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:30,797 INFO L225 Difference]: With dead ends: 1312 [2023-12-20 09:41:30,797 INFO L226 Difference]: Without dead ends: 923 [2023-12-20 09:41:30,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 09:41:30,799 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 446 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:30,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 264 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 09:41:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-12-20 09:41:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 634. [2023-12-20 09:41:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 541 states have (on average 1.3290203327171903) internal successors, (719), 542 states have internal predecessors, (719), 76 states have call successors, (76), 16 states have call predecessors, (76), 16 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2023-12-20 09:41:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 871 transitions. [2023-12-20 09:41:30,893 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 871 transitions. Word has length 35 [2023-12-20 09:41:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:30,893 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 871 transitions. [2023-12-20 09:41:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 871 transitions. [2023-12-20 09:41:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 09:41:30,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:30,894 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:30,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 09:41:31,099 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:31,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -89497915, now seen corresponding path program 5 times [2023-12-20 09:41:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:31,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485048645] [2023-12-20 09:41:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:31,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:31,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984663195] [2023-12-20 09:41:31,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:41:31,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:31,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:31,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 09:41:31,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 09:41:31,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:31,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 09:41:31,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:31,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:41:31,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485048645] [2023-12-20 09:41:31,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984663195] [2023-12-20 09:41:31,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984663195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:41:31,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:41:31,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-20 09:41:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142013316] [2023-12-20 09:41:31,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:31,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:41:31,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:31,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:41:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-20 09:41:31,406 INFO L87 Difference]: Start difference. First operand 634 states and 871 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:32,349 INFO L93 Difference]: Finished difference Result 721 states and 960 transitions. [2023-12-20 09:41:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 09:41:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 09:41:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:32,351 INFO L225 Difference]: With dead ends: 721 [2023-12-20 09:41:32,351 INFO L226 Difference]: Without dead ends: 717 [2023-12-20 09:41:32,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-12-20 09:41:32,352 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 156 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:32,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 303 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 09:41:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-12-20 09:41:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 560. [2023-12-20 09:41:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 476 states have (on average 1.3214285714285714) internal successors, (629), 478 states have internal predecessors, (629), 68 states have call successors, (68), 15 states have call predecessors, (68), 15 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-20 09:41:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 765 transitions. [2023-12-20 09:41:32,442 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 765 transitions. Word has length 35 [2023-12-20 09:41:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:32,442 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 765 transitions. [2023-12-20 09:41:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 765 transitions. [2023-12-20 09:41:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 09:41:32,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:32,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:32,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:32,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:32,648 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:32,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:32,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1468030774, now seen corresponding path program 11 times [2023-12-20 09:41:32,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:32,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209831710] [2023-12-20 09:41:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:32,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:32,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151726291] [2023-12-20 09:41:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:41:32,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:32,665 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 09:41:32,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 09:41:32,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:32,865 WARN L260 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 123 conjunts are in the unsatisfiable core [2023-12-20 09:41:32,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:32,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:32,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:32,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:32,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:32,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:32,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:32,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:32,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:33,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:33,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:33,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:33,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:33,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:41:33,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:33,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:41:33,930 INFO L349 Elim1Store]: treesize reduction 144, result has 31.8 percent of original size [2023-12-20 09:41:33,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 98 treesize of output 154 [2023-12-20 09:41:34,006 INFO L349 Elim1Store]: treesize reduction 156, result has 30.0 percent of original size [2023-12-20 09:41:34,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 98 treesize of output 156 [2023-12-20 09:41:35,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:35,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 130 [2023-12-20 09:41:35,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:35,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 73 [2023-12-20 09:41:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:35,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:35,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209831710] [2023-12-20 09:41:35,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151726291] [2023-12-20 09:41:35,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151726291] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:35,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:35,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-20 09:41:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242658642] [2023-12-20 09:41:35,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:35,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 09:41:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 09:41:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 09:41:35,993 INFO L87 Difference]: Start difference. First operand 560 states and 765 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:38,173 INFO L93 Difference]: Finished difference Result 595 states and 806 transitions. [2023-12-20 09:41:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 09:41:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-12-20 09:41:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:38,175 INFO L225 Difference]: With dead ends: 595 [2023-12-20 09:41:38,175 INFO L226 Difference]: Without dead ends: 591 [2023-12-20 09:41:38,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 09:41:38,176 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:38,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 281 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 09:41:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-12-20 09:41:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 574. [2023-12-20 09:41:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 488 states have (on average 1.319672131147541) internal successors, (644), 490 states have internal predecessors, (644), 69 states have call successors, (69), 16 states have call predecessors, (69), 16 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-20 09:41:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 782 transitions. [2023-12-20 09:41:38,280 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 782 transitions. Word has length 36 [2023-12-20 09:41:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:38,280 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 782 transitions. [2023-12-20 09:41:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 782 transitions. [2023-12-20 09:41:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 09:41:38,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:38,281 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:38,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:38,486 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:38,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1547072844, now seen corresponding path program 6 times [2023-12-20 09:41:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:38,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172485378] [2023-12-20 09:41:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:38,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:38,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498148887] [2023-12-20 09:41:38,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:41:38,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:38,502 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 09:41:38,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 09:41:38,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:38,677 WARN L260 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 118 conjunts are in the unsatisfiable core [2023-12-20 09:41:38,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:38,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:38,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:38,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:38,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:41:38,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:38,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:41:38,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:38,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:41:38,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:38,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:41:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 60 [2023-12-20 09:41:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:38,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:38,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 60 [2023-12-20 09:41:39,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,740 INFO L349 Elim1Store]: treesize reduction 203, result has 30.2 percent of original size [2023-12-20 09:41:39,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 110 treesize of output 181 [2023-12-20 09:41:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:39,814 INFO L349 Elim1Store]: treesize reduction 191, result has 31.5 percent of original size [2023-12-20 09:41:39,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 110 treesize of output 179 [2023-12-20 09:41:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:42,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 297 treesize of output 340 [2023-12-20 09:41:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:42,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:41:42,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 272 treesize of output 313 [2023-12-20 09:41:49,531 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:41:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:49,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172485378] [2023-12-20 09:41:50,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498148887] [2023-12-20 09:41:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498148887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:50,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:50,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-20 09:41:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859719771] [2023-12-20 09:41:50,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 09:41:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:50,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 09:41:50,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:41:50,374 INFO L87 Difference]: Start difference. First operand 574 states and 782 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:52,474 INFO L93 Difference]: Finished difference Result 604 states and 817 transitions. [2023-12-20 09:41:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 09:41:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-12-20 09:41:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:52,476 INFO L225 Difference]: With dead ends: 604 [2023-12-20 09:41:52,476 INFO L226 Difference]: Without dead ends: 600 [2023-12-20 09:41:52,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 09:41:52,478 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:52,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 302 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 09:41:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-12-20 09:41:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 575. [2023-12-20 09:41:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 489 states have (on average 1.3210633946830266) internal successors, (646), 490 states have internal predecessors, (646), 69 states have call successors, (69), 16 states have call predecessors, (69), 16 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-20 09:41:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 784 transitions. [2023-12-20 09:41:52,594 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 784 transitions. Word has length 36 [2023-12-20 09:41:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:52,594 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 784 transitions. [2023-12-20 09:41:52,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:41:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 784 transitions. [2023-12-20 09:41:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:41:52,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:52,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:52,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-20 09:41:52,801 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:52,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1535135787, now seen corresponding path program 1 times [2023-12-20 09:41:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:52,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205902427] [2023-12-20 09:41:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:52,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327689484] [2023-12-20 09:41:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:52,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:52,815 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:52,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 09:41:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:41:52,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-20 09:41:52,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:52,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:52,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:41:52,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:41:52,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:41:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:53,194 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 09:41:53,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 09:41:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:53,202 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 09:41:53,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-12-20 09:41:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:53,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:41:53,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:41:53,821 INFO L349 Elim1Store]: treesize reduction 63, result has 21.3 percent of original size [2023-12-20 09:41:53,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 77 treesize of output 104 [2023-12-20 09:41:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:41:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:41:53,887 INFO L349 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2023-12-20 09:41:53,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 66 [2023-12-20 09:41:54,414 INFO L349 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2023-12-20 09:41:54,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2023-12-20 09:41:54,440 INFO L349 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2023-12-20 09:41:54,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 28 [2023-12-20 09:41:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:54,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:54,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205902427] [2023-12-20 09:41:54,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:54,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327689484] [2023-12-20 09:41:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327689484] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:41:54,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:41:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-20 09:41:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590850717] [2023-12-20 09:41:54,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 09:41:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 09:41:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2023-12-20 09:41:54,775 INFO L87 Difference]: Start difference. First operand 575 states and 784 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:41:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:56,211 INFO L93 Difference]: Finished difference Result 655 states and 881 transitions. [2023-12-20 09:41:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 09:41:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-12-20 09:41:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:56,215 INFO L225 Difference]: With dead ends: 655 [2023-12-20 09:41:56,215 INFO L226 Difference]: Without dead ends: 647 [2023-12-20 09:41:56,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 09:41:56,217 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 88 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:56,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 348 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 09:41:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-12-20 09:41:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 626. [2023-12-20 09:41:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 531 states have (on average 1.3220338983050848) internal successors, (702), 531 states have internal predecessors, (702), 76 states have call successors, (76), 18 states have call predecessors, (76), 18 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-12-20 09:41:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 854 transitions. [2023-12-20 09:41:56,335 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 854 transitions. Word has length 38 [2023-12-20 09:41:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:56,335 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 854 transitions. [2023-12-20 09:41:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:41:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 854 transitions. [2023-12-20 09:41:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 09:41:56,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:56,336 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:56,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-20 09:41:56,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-20 09:41:56,541 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:56,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1762227175, now seen corresponding path program 12 times [2023-12-20 09:41:56,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:56,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658744541] [2023-12-20 09:41:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:56,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:56,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:56,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489979049] [2023-12-20 09:41:56,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:41:56,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:56,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:56,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 09:41:56,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 09:41:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:41:56,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 09:41:56,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:56,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:41:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:56,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658744541] [2023-12-20 09:41:56,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:56,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489979049] [2023-12-20 09:41:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489979049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:41:56,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:41:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-20 09:41:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323281510] [2023-12-20 09:41:56,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:56,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 09:41:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 09:41:56,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-20 09:41:56,851 INFO L87 Difference]: Start difference. First operand 626 states and 854 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:58,237 INFO L93 Difference]: Finished difference Result 1726 states and 2344 transitions. [2023-12-20 09:41:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-20 09:41:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-12-20 09:41:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:58,259 INFO L225 Difference]: With dead ends: 1726 [2023-12-20 09:41:58,259 INFO L226 Difference]: Without dead ends: 1184 [2023-12-20 09:41:58,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=648, Invalid=2108, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 09:41:58,261 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 851 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:58,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 284 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 09:41:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2023-12-20 09:41:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 751. [2023-12-20 09:41:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 638 states have (on average 1.3260188087774294) internal successors, (846), 638 states have internal predecessors, (846), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-12-20 09:41:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1032 transitions. [2023-12-20 09:41:58,415 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1032 transitions. Word has length 37 [2023-12-20 09:41:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:41:58,415 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1032 transitions. [2023-12-20 09:41:58,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1032 transitions. [2023-12-20 09:41:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 09:41:58,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:41:58,417 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:41:58,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 09:41:58,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:58,623 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:41:58,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:41:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -196828094, now seen corresponding path program 13 times [2023-12-20 09:41:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:41:58,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309253743] [2023-12-20 09:41:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:41:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:41:58,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:41:58,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464257587] [2023-12-20 09:41:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:41:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:41:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:41:58,640 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:41:58,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 09:41:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:41:58,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 09:41:58,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:41:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:41:58,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:41:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:41:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:41:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309253743] [2023-12-20 09:41:59,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:41:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464257587] [2023-12-20 09:41:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464257587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:41:59,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:41:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-20 09:41:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5441884] [2023-12-20 09:41:59,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:41:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 09:41:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:41:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 09:41:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-20 09:41:59,007 INFO L87 Difference]: Start difference. First operand 751 states and 1032 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:41:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:41:59,868 INFO L93 Difference]: Finished difference Result 845 states and 1124 transitions. [2023-12-20 09:41:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 09:41:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-12-20 09:41:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:41:59,895 INFO L225 Difference]: With dead ends: 845 [2023-12-20 09:41:59,895 INFO L226 Difference]: Without dead ends: 841 [2023-12-20 09:41:59,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-12-20 09:41:59,896 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 181 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:41:59,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 383 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 09:41:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-12-20 09:42:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 746. [2023-12-20 09:42:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 633 states have (on average 1.3254344391785151) internal successors, (839), 634 states have internal predecessors, (839), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-12-20 09:42:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1025 transitions. [2023-12-20 09:42:00,045 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1025 transitions. Word has length 37 [2023-12-20 09:42:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:00,046 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1025 transitions. [2023-12-20 09:42:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1025 transitions. [2023-12-20 09:42:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 09:42:00,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:00,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:00,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-20 09:42:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:00,252 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:00,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 319927629, now seen corresponding path program 2 times [2023-12-20 09:42:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170699631] [2023-12-20 09:42:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:00,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:00,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706989900] [2023-12-20 09:42:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:42:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:00,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:00,265 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:00,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 09:42:00,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:42:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:00,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 09:42:00,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 09:42:00,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 09:42:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170699631] [2023-12-20 09:42:00,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706989900] [2023-12-20 09:42:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706989900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:42:00,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:42:00,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 09:42:00,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897366668] [2023-12-20 09:42:00,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 09:42:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 09:42:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:42:00,464 INFO L87 Difference]: Start difference. First operand 746 states and 1025 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:01,075 INFO L93 Difference]: Finished difference Result 783 states and 1062 transitions. [2023-12-20 09:42:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 09:42:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-12-20 09:42:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:01,077 INFO L225 Difference]: With dead ends: 783 [2023-12-20 09:42:01,077 INFO L226 Difference]: Without dead ends: 779 [2023-12-20 09:42:01,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-12-20 09:42:01,078 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:01,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 90 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:42:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-12-20 09:42:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 512. [2023-12-20 09:42:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 429 states have (on average 1.303030303030303) internal successors, (559), 430 states have internal predecessors, (559), 66 states have call successors, (66), 16 states have call predecessors, (66), 16 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-20 09:42:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 691 transitions. [2023-12-20 09:42:01,211 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 691 transitions. Word has length 39 [2023-12-20 09:42:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:01,211 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 691 transitions. [2023-12-20 09:42:01,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 691 transitions. [2023-12-20 09:42:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:42:01,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:01,213 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:01,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:01,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-20 09:42:01,419 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:01,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1780162705, now seen corresponding path program 14 times [2023-12-20 09:42:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:01,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718428685] [2023-12-20 09:42:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:01,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:01,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:01,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861456815] [2023-12-20 09:42:01,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:42:01,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:01,442 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:01,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 09:42:01,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:42:01,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:01,596 WARN L260 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 138 conjunts are in the unsatisfiable core [2023-12-20 09:42:01,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:01,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:01,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:01,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:01,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:01,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:01,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:01,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:42:01,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:42:01,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:42:01,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:42:01,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:42:01,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:01,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:42:02,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:02,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-20 09:42:02,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:02,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-20 09:42:02,825 INFO L349 Elim1Store]: treesize reduction 184, result has 32.6 percent of original size [2023-12-20 09:42:02,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 112 treesize of output 182 [2023-12-20 09:42:02,917 INFO L349 Elim1Store]: treesize reduction 200, result has 30.8 percent of original size [2023-12-20 09:42:02,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 112 treesize of output 184 [2023-12-20 09:42:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:05,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:05,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 270 treesize of output 296 [2023-12-20 09:42:05,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:05,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 290 treesize of output 186 [2023-12-20 09:42:06,326 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:42:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:06,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718428685] [2023-12-20 09:42:07,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861456815] [2023-12-20 09:42:07,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861456815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:42:07,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:42:07,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-12-20 09:42:07,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086040225] [2023-12-20 09:42:07,277 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:07,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 09:42:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 09:42:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:42:07,278 INFO L87 Difference]: Start difference. First operand 512 states and 691 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:09,014 INFO L93 Difference]: Finished difference Result 560 states and 747 transitions. [2023-12-20 09:42:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-20 09:42:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-12-20 09:42:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:09,016 INFO L225 Difference]: With dead ends: 560 [2023-12-20 09:42:09,016 INFO L226 Difference]: Without dead ends: 556 [2023-12-20 09:42:09,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 09:42:09,021 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 91 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:09,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 254 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 09:42:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-12-20 09:42:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 526. [2023-12-20 09:42:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 441 states have (on average 1.3015873015873016) internal successors, (574), 442 states have internal predecessors, (574), 67 states have call successors, (67), 17 states have call predecessors, (67), 17 states have return successors, (67), 66 states have call predecessors, (67), 67 states have call successors, (67) [2023-12-20 09:42:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 708 transitions. [2023-12-20 09:42:09,210 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 708 transitions. Word has length 38 [2023-12-20 09:42:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:09,211 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 708 transitions. [2023-12-20 09:42:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 708 transitions. [2023-12-20 09:42:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:42:09,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:09,211 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:09,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 09:42:09,418 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:09,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1493736237, now seen corresponding path program 7 times [2023-12-20 09:42:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796018420] [2023-12-20 09:42:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:09,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:09,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:09,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035682285] [2023-12-20 09:42:09,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:42:09,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:09,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:09,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 09:42:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:09,589 WARN L260 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-20 09:42:09,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:09,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:09,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:09,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:09,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:09,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:09,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:09,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:42:09,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 09:42:09,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:42:09,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 09:42:09,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:42:09,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:09,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 09:42:10,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:10,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-20 09:42:10,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:10,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-20 09:42:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:10,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:10,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:11,030 INFO L349 Elim1Store]: treesize reduction 188, result has 29.6 percent of original size [2023-12-20 09:42:11,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 25 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 97 case distinctions, treesize of input 116 treesize of output 190 [2023-12-20 09:42:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:11,138 INFO L349 Elim1Store]: treesize reduction 200, result has 28.3 percent of original size [2023-12-20 09:42:11,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 25 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 97 case distinctions, treesize of input 116 treesize of output 192 [2023-12-20 09:42:13,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:13,554 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 255 treesize of output 265 [2023-12-20 09:42:13,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:13,629 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 204 treesize of output 210 [2023-12-20 09:42:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:14,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796018420] [2023-12-20 09:42:15,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035682285] [2023-12-20 09:42:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035682285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:42:15,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:42:15,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-20 09:42:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293350382] [2023-12-20 09:42:15,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:42:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:42:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 09:42:15,755 INFO L87 Difference]: Start difference. First operand 526 states and 708 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:18,484 INFO L93 Difference]: Finished difference Result 557 states and 743 transitions. [2023-12-20 09:42:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 09:42:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-12-20 09:42:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:18,486 INFO L225 Difference]: With dead ends: 557 [2023-12-20 09:42:18,486 INFO L226 Difference]: Without dead ends: 553 [2023-12-20 09:42:18,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 09:42:18,488 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:18,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 266 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 09:42:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-12-20 09:42:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 527. [2023-12-20 09:42:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 442 states have (on average 1.3031674208144797) internal successors, (576), 442 states have internal predecessors, (576), 67 states have call successors, (67), 17 states have call predecessors, (67), 17 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-12-20 09:42:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 710 transitions. [2023-12-20 09:42:18,622 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 710 transitions. Word has length 38 [2023-12-20 09:42:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:18,622 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 710 transitions. [2023-12-20 09:42:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 710 transitions. [2023-12-20 09:42:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 09:42:18,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:18,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:18,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-20 09:42:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 09:42:18,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:18,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 877342664, now seen corresponding path program 1 times [2023-12-20 09:42:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254235250] [2023-12-20 09:42:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:18,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416489936] [2023-12-20 09:42:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:18,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:18,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:18,842 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:18,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 09:42:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:19,007 WARN L260 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-20 09:42:19,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:19,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:19,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:19,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:19,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:19,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:19,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:19,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:19,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:19,550 INFO L349 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2023-12-20 09:42:19,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 56 treesize of output 88 [2023-12-20 09:42:19,601 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-12-20 09:42:19,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 56 treesize of output 86 [2023-12-20 09:42:20,425 INFO L349 Elim1Store]: treesize reduction 144, result has 40.7 percent of original size [2023-12-20 09:42:20,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 175 treesize of output 246 [2023-12-20 09:42:20,580 INFO L349 Elim1Store]: treesize reduction 156, result has 38.8 percent of original size [2023-12-20 09:42:20,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 143 treesize of output 216 [2023-12-20 09:42:23,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:23,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 116 [2023-12-20 09:42:23,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:23,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2023-12-20 09:42:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:23,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254235250] [2023-12-20 09:42:24,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416489936] [2023-12-20 09:42:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416489936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:42:24,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:42:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-20 09:42:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533760959] [2023-12-20 09:42:24,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 09:42:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 09:42:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 09:42:24,134 INFO L87 Difference]: Start difference. First operand 527 states and 710 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:25,565 INFO L93 Difference]: Finished difference Result 555 states and 741 transitions. [2023-12-20 09:42:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 09:42:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-12-20 09:42:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:25,567 INFO L225 Difference]: With dead ends: 555 [2023-12-20 09:42:25,567 INFO L226 Difference]: Without dead ends: 546 [2023-12-20 09:42:25,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:42:25,568 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:25,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 232 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:42:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-12-20 09:42:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2023-12-20 09:42:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 453 states have (on average 1.2980132450331126) internal successors, (588), 453 states have internal predecessors, (588), 68 states have call successors, (68), 18 states have call predecessors, (68), 18 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-20 09:42:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 724 transitions. [2023-12-20 09:42:25,730 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 724 transitions. Word has length 40 [2023-12-20 09:42:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:25,730 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 724 transitions. [2023-12-20 09:42:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 724 transitions. [2023-12-20 09:42:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 09:42:25,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:25,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:25,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:25,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 09:42:25,937 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:25,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1135508102, now seen corresponding path program 1 times [2023-12-20 09:42:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530957570] [2023-12-20 09:42:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:25,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:25,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775919018] [2023-12-20 09:42:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:25,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:25,948 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:25,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 09:42:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:26,092 WARN L260 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-20 09:42:26,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:26,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:26,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:26,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:42:26,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:42:26,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:26,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:26,571 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-12-20 09:42:26,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2023-12-20 09:42:26,613 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-12-20 09:42:26,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2023-12-20 09:42:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:27,130 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-20 09:42:27,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 162 [2023-12-20 09:42:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:27,154 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-20 09:42:27,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 154 treesize of output 137 [2023-12-20 09:42:27,937 INFO L349 Elim1Store]: treesize reduction 97, result has 34.9 percent of original size [2023-12-20 09:42:27,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 198 treesize of output 185 [2023-12-20 09:42:27,995 INFO L349 Elim1Store]: treesize reduction 81, result has 45.6 percent of original size [2023-12-20 09:42:27,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 214 treesize of output 167 [2023-12-20 09:42:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:28,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530957570] [2023-12-20 09:42:28,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775919018] [2023-12-20 09:42:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775919018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:42:28,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:42:28,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-20 09:42:28,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666764394] [2023-12-20 09:42:28,831 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:28,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 09:42:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 09:42:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 09:42:28,832 INFO L87 Difference]: Start difference. First operand 540 states and 724 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:31,529 INFO L93 Difference]: Finished difference Result 668 states and 891 transitions. [2023-12-20 09:42:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 09:42:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-12-20 09:42:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:31,545 INFO L225 Difference]: With dead ends: 668 [2023-12-20 09:42:31,545 INFO L226 Difference]: Without dead ends: 658 [2023-12-20 09:42:31,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 09:42:31,548 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 142 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:31,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 659 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-20 09:42:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2023-12-20 09:42:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 632. [2023-12-20 09:42:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 529 states have (on average 1.3005671077504726) internal successors, (688), 529 states have internal predecessors, (688), 82 states have call successors, (82), 20 states have call predecessors, (82), 20 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-20 09:42:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 852 transitions. [2023-12-20 09:42:31,711 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 852 transitions. Word has length 40 [2023-12-20 09:42:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:31,711 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 852 transitions. [2023-12-20 09:42:31,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 852 transitions. [2023-12-20 09:42:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 09:42:31,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:31,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:31,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 09:42:31,918 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:31,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1096197382, now seen corresponding path program 2 times [2023-12-20 09:42:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:31,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383472704] [2023-12-20 09:42:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:31,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:31,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:31,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866811526] [2023-12-20 09:42:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:42:31,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:31,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:31,930 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:31,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 09:42:32,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:42:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:32,081 WARN L260 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-20 09:42:32,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:32,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:32,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:32,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:32,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 09:42:32,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:32,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:32,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:32,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 09:42:32,616 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:42:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:32,655 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2023-12-20 09:42:32,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 60 treesize of output 78 [2023-12-20 09:42:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:32,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:42:32,672 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2023-12-20 09:42:32,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 60 treesize of output 82 [2023-12-20 09:42:33,172 INFO L349 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2023-12-20 09:42:33,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 68 treesize of output 98 [2023-12-20 09:42:33,220 INFO L349 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2023-12-20 09:42:33,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 62 treesize of output 77 [2023-12-20 09:42:33,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:33,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 80 [2023-12-20 09:42:33,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:33,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 39 [2023-12-20 09:42:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:33,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:33,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383472704] [2023-12-20 09:42:33,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:33,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866811526] [2023-12-20 09:42:33,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866811526] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:42:33,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:42:33,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-20 09:42:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111632388] [2023-12-20 09:42:33,905 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:42:33,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:42:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:42:33,907 INFO L87 Difference]: Start difference. First operand 632 states and 852 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:35,221 INFO L93 Difference]: Finished difference Result 657 states and 880 transitions. [2023-12-20 09:42:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 09:42:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-12-20 09:42:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:35,223 INFO L225 Difference]: With dead ends: 657 [2023-12-20 09:42:35,223 INFO L226 Difference]: Without dead ends: 648 [2023-12-20 09:42:35,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=1956, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 09:42:35,224 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:35,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 314 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:42:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-12-20 09:42:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 639. [2023-12-20 09:42:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 534 states have (on average 1.299625468164794) internal successors, (694), 534 states have internal predecessors, (694), 83 states have call successors, (83), 21 states have call predecessors, (83), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-12-20 09:42:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 860 transitions. [2023-12-20 09:42:35,397 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 860 transitions. Word has length 40 [2023-12-20 09:42:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:35,397 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 860 transitions. [2023-12-20 09:42:35,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 860 transitions. [2023-12-20 09:42:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 09:42:35,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:35,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:35,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:35,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1354362820, now seen corresponding path program 3 times [2023-12-20 09:42:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:35,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320618762] [2023-12-20 09:42:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:35,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74633060] [2023-12-20 09:42:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:42:35,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:35,613 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:35,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 09:42:35,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 09:42:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:35,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-20 09:42:35,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:35,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:35,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:42:35,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:42:35,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:42:35,863 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-20 09:42:35,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-12-20 09:42:35,885 INFO L349 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-12-20 09:42:35,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2023-12-20 09:42:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:36,303 INFO L349 Elim1Store]: treesize reduction 155, result has 33.5 percent of original size [2023-12-20 09:42:36,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 68 treesize of output 125 [2023-12-20 09:42:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:36,335 INFO L349 Elim1Store]: treesize reduction 71, result has 33.6 percent of original size [2023-12-20 09:42:36,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 75 [2023-12-20 09:42:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:39,047 INFO L349 Elim1Store]: treesize reduction 1079, result has 22.5 percent of original size [2023-12-20 09:42:39,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 3 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 131 case distinctions, treesize of input 436 treesize of output 669 [2023-12-20 09:42:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:42:39,599 INFO L349 Elim1Store]: treesize reduction 805, result has 26.0 percent of original size [2023-12-20 09:42:39,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 100 case distinctions, treesize of input 344 treesize of output 561 [2023-12-20 09:45:46,697 WARN L293 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 440 DAG size of output: 459 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 09:49:31,647 WARN L293 SmtUtils]: Spent 31.88s on a formula simplification. DAG size of input: 324 DAG size of output: 528 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 09:54:24,566 WARN L293 SmtUtils]: Spent 15.69s on a formula simplification. DAG size of input: 557 DAG size of output: 655 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-12-20 09:54:45,443 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:54:45,446 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:54:45,450 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 09:54:45,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-20 09:54:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-20 09:54:45,656 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-105-8-59-11-7-12-4-12-2-2-1 context. [2023-12-20 09:54:45,660 INFO L445 BasicCegarLoop]: Path program histogram: [14, 7, 3, 2, 1, 1, 1, 1, 1] [2023-12-20 09:54:45,662 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 09:54:45,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 09:54:45 BoogieIcfgContainer [2023-12-20 09:54:45,664 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 09:54:45,664 INFO L158 Benchmark]: Toolchain (without parser) took 856735.29ms. Allocated memory was 283.1MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 246.2MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 896.8MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 197.1MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.13ms. Allocated memory is still 283.1MB. Free memory was 245.7MB in the beginning and 234.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.27ms. Allocated memory is still 283.1MB. Free memory was 234.1MB in the beginning and 232.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: Boogie Preprocessor took 42.80ms. Allocated memory is still 283.1MB. Free memory was 232.6MB in the beginning and 230.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: RCFGBuilder took 252.84ms. Allocated memory is still 283.1MB. Free memory was 230.5MB in the beginning and 216.3MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,664 INFO L158 Benchmark]: TraceAbstraction took 856247.32ms. Allocated memory was 283.1MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 215.8MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 866.4MB. Max. memory is 8.0GB. [2023-12-20 09:54:45,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 197.1MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 166.13ms. Allocated memory is still 283.1MB. Free memory was 245.7MB in the beginning and 234.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.27ms. Allocated memory is still 283.1MB. Free memory was 234.1MB in the beginning and 232.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.80ms. Allocated memory is still 283.1MB. Free memory was 232.6MB in the beginning and 230.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 252.84ms. Allocated memory is still 283.1MB. Free memory was 230.5MB in the beginning and 216.3MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 856247.32ms. Allocated memory was 283.1MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 215.8MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 866.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 41). Cancelled while NwaCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-105-8-59-11-7-12-4-12-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 856.2s, OverallIterations: 31, TraceHistogramMax: 7, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 34.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3776 SdHoareTripleChecker+Valid, 18.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3703 mSDsluCounter, 6749 SdHoareTripleChecker+Invalid, 17.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5751 mSDsCounter, 1628 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13450 IncrementalHoareTripleChecker+Invalid, 15078 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1628 mSolverCounterUnsat, 998 mSDtfsCounter, 13450 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1837 GetRequests, 786 SyntacticMatches, 55 SemanticMatches, 996 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10614 ImplicationChecksByTransitivity, 43.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=751occurred in iteration=23, InterpolantAutomatonStates: 684, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 30 MinimizatonAttempts, 1881 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 79.1s InterpolantComputationTime, 971 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 1287 ConstructedInterpolants, 196 QuantifiedInterpolants, 48616 SizeOfPredicates, 295 NumberOfNonLiveVariables, 4728 ConjunctsInSsa, 1681 ConjunctsInUnsatCore, 41 InterpolantComputations, 4 PerfectInterpolantSequences, 449/1095 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown