/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-tiling/rewnif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:01:50,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:01:50,956 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 08:01:50,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:01:50,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:01:50,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:01:50,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:01:50,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:01:50,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:01:50,973 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:01:50,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:01:50,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:01:50,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:01:50,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:01:50,974 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:01:50,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:01:50,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:01:50,975 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:01:50,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:01:50,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:01:50,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:01:50,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:01:50,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:01:50,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:01:50,976 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:01:50,977 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:01:50,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:01:50,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:01:50,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:01:50,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:01:50,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:01:50,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:01:50,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:01:50,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:01:50,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:01:50,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:01:50,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:01:50,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:01:51,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:01:51,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:01:51,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:01:51,161 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:01:51,161 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:01:51,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnif.c [2023-12-20 08:01:52,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:01:52,382 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:01:52,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnif.c [2023-12-20 08:01:52,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44dbfa64/4213d19580b64272b2ab4ba6998b2888/FLAG53c57cc7c [2023-12-20 08:01:52,398 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44dbfa64/4213d19580b64272b2ab4ba6998b2888 [2023-12-20 08:01:52,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:01:52,401 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:01:52,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:01:52,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:01:52,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:01:52,406 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,407 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c5742b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52, skipping insertion in model container [2023-12-20 08:01:52,407 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,422 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:01:52,533 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnif.c[397,410] [2023-12-20 08:01:52,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:01:52,549 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:01:52,557 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnif.c[397,410] [2023-12-20 08:01:52,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:01:52,579 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:01:52,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52 WrapperNode [2023-12-20 08:01:52,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:01:52,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:01:52,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:01:52,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:01:52,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,618 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-12-20 08:01:52,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:01:52,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:01:52,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:01:52,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:01:52,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,645 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-20 08:01:52,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:01:52,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:01:52,653 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:01:52,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:01:52,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (1/1) ... [2023-12-20 08:01:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:01:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:52,681 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 08:01:52,684 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 08:01:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:01:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:01:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:01:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:01:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:01:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 08:01:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:01:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:01:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:01:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:01:52,787 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:01:52,790 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:01:52,953 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:01:52,990 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:01:52,990 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 08:01:52,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:01:52 BoogieIcfgContainer [2023-12-20 08:01:52,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:01:52,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:01:52,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:01:52,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:01:52,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:01:52" (1/3) ... [2023-12-20 08:01:52,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282c3dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:01:52, skipping insertion in model container [2023-12-20 08:01:52,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:01:52" (2/3) ... [2023-12-20 08:01:52,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282c3dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:01:52, skipping insertion in model container [2023-12-20 08:01:52,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:01:52" (3/3) ... [2023-12-20 08:01:53,000 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2023-12-20 08:01:53,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:01:53,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:01:53,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:01:53,050 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;@36b6d8aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:01:53,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:01:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-20 08:01:53,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:53,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:53,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:53,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1562928649, now seen corresponding path program 1 times [2023-12-20 08:01:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376200103] [2023-12-20 08:01:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:53,193 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 08:01:53,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:53,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376200103] [2023-12-20 08:01:53,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376200103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:01:53,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:01:53,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 08:01:53,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199051779] [2023-12-20 08:01:53,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:01:53,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:01:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:01:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:01:53,226 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:53,250 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-12-20 08:01:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:01:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-20 08:01:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:53,257 INFO L225 Difference]: With dead ends: 23 [2023-12-20 08:01:53,257 INFO L226 Difference]: Without dead ends: 11 [2023-12-20 08:01:53,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 08:01:53,262 INFO L413 NwaCegarLoop]: 13 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, 13 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 08:01:53,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:01:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-20 08:01:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-20 08:01:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-12-20 08:01:53,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2023-12-20 08:01:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:53,282 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-12-20 08:01:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-12-20 08:01:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-20 08:01:53,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:53,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 08:01:53,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:53,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1574934422, now seen corresponding path program 1 times [2023-12-20 08:01:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:53,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744494094] [2023-12-20 08:01:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:53,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:53,357 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 08:01:53,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:53,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744494094] [2023-12-20 08:01:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744494094] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:01:53,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:01:53,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 08:01:53,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936825692] [2023-12-20 08:01:53,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:01:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:01:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:01:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:01:53,360 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:53,378 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-20 08:01:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:01:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-20 08:01:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:53,379 INFO L225 Difference]: With dead ends: 23 [2023-12-20 08:01:53,379 INFO L226 Difference]: Without dead ends: 14 [2023-12-20 08:01:53,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 08:01:53,380 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:01:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-20 08:01:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-12-20 08:01:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-20 08:01:53,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-12-20 08:01:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:53,383 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-20 08:01:53,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-20 08:01:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 08:01:53,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:53,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 08:01:53,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:53,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash -994451034, now seen corresponding path program 1 times [2023-12-20 08:01:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690054957] [2023-12-20 08:01:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690054957] [2023-12-20 08:01:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690054957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066552392] [2023-12-20 08:01:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:53,585 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 08:01:53,589 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 08:01:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:53,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:01:53,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:53,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066552392] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:53,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:53,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-20 08:01:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143143685] [2023-12-20 08:01:53,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:01:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:01:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:01:53,773 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:53,829 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-12-20 08:01:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 08:01:53,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-20 08:01:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:53,830 INFO L225 Difference]: With dead ends: 26 [2023-12-20 08:01:53,830 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 08:01:53,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:01:53,833 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:53,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:01:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 08:01:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-12-20 08:01:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-20 08:01:53,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-12-20 08:01:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:53,842 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-20 08:01:53,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-20 08:01:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 08:01:53,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:53,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:53,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 08:01:54,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:54,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1872132756, now seen corresponding path program 1 times [2023-12-20 08:01:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734969518] [2023-12-20 08:01:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:54,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734969518] [2023-12-20 08:01:54,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734969518] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387097209] [2023-12-20 08:01:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:54,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:54,369 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 08:01:54,389 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 08:01:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:54,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:01:54,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:54,483 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 08:01:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:54,528 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 21 treesize of output 20 [2023-12-20 08:01:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:54,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:54,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-20 08:01:54,710 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 114 treesize of output 110 [2023-12-20 08:01:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:54,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387097209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:54,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:54,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-12-20 08:01:54,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603822243] [2023-12-20 08:01:54,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:54,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 08:01:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 08:01:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-12-20 08:01:54,733 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:54,884 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-12-20 08:01:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 08:01:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 08:01:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:54,885 INFO L225 Difference]: With dead ends: 24 [2023-12-20 08:01:54,885 INFO L226 Difference]: Without dead ends: 22 [2023-12-20 08:01:54,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:01:54,886 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:54,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:01:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-20 08:01:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2023-12-20 08:01:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-20 08:01:54,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2023-12-20 08:01:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:54,901 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-20 08:01:54,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-20 08:01:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 08:01:54,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:54,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:54,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-20 08:01:55,109 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,SelfDestructingSolverStorable3 [2023-12-20 08:01:55,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:55,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1743708518, now seen corresponding path program 1 times [2023-12-20 08:01:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:55,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604406705] [2023-12-20 08:01:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:55,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:55,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:55,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604406705] [2023-12-20 08:01:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604406705] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:55,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506596816] [2023-12-20 08:01:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:55,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:55,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:55,258 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 08:01:55,270 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 08:01:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:55,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 08:01:55,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:55,328 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 08:01:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:55,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:55,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 08:01:55,465 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 20 treesize of output 16 [2023-12-20 08:01:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506596816] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:55,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:55,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-12-20 08:01:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624278235] [2023-12-20 08:01:55,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 08:01:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 08:01:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-12-20 08:01:55,476 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:55,608 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-12-20 08:01:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 08:01:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 08:01:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:55,610 INFO L225 Difference]: With dead ends: 46 [2023-12-20 08:01:55,610 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 08:01:55,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:01:55,611 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:55,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 61 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:01:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 08:01:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2023-12-20 08:01:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-12-20 08:01:55,621 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2023-12-20 08:01:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:55,621 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-12-20 08:01:55,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-12-20 08:01:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 08:01:55,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:55,622 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:55,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 08:01:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:55,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -803648724, now seen corresponding path program 2 times [2023-12-20 08:01:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997287926] [2023-12-20 08:01:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:55,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:55,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997287926] [2023-12-20 08:01:55,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997287926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:55,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250347984] [2023-12-20 08:01:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:01:55,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:55,945 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 08:01:55,960 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 08:01:56,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:01:56,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:56,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 08:01:56,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:56,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250347984] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:56,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-12-20 08:01:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288737120] [2023-12-20 08:01:56,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:56,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 08:01:56,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 08:01:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-12-20 08:01:56,116 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:56,176 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-12-20 08:01:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:01:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 08:01:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:56,179 INFO L225 Difference]: With dead ends: 67 [2023-12-20 08:01:56,179 INFO L226 Difference]: Without dead ends: 37 [2023-12-20 08:01:56,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-12-20 08:01:56,180 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:56,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:01:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-20 08:01:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-12-20 08:01:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-20 08:01:56,187 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2023-12-20 08:01:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:56,187 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-20 08:01:56,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-20 08:01:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 08:01:56,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:56,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:56,208 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 08:01:56,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:56,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:56,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash -217740570, now seen corresponding path program 3 times [2023-12-20 08:01:56,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:56,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620434379] [2023-12-20 08:01:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:56,648 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 08:01:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620434379] [2023-12-20 08:01:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620434379] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413379310] [2023-12-20 08:01:56,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:01:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:56,650 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 08:01:56,683 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 08:01:56,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:01:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:56,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 08:01:56,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:56,733 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 08:01:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:56,765 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 31 treesize of output 11 [2023-12-20 08:01:56,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:56,775 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 21 treesize of output 20 [2023-12-20 08:01:56,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:56,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:56,833 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 30 treesize of output 32 [2023-12-20 08:01:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:57,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:57,105 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 08:01:57,114 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 98 treesize of output 94 [2023-12-20 08:01:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:01:57,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413379310] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:57,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:57,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-12-20 08:01:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924880698] [2023-12-20 08:01:57,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:57,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:01:57,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:01:57,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:01:57,159 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:57,539 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2023-12-20 08:01:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 08:01:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-20 08:01:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:57,541 INFO L225 Difference]: With dead ends: 57 [2023-12-20 08:01:57,541 INFO L226 Difference]: Without dead ends: 55 [2023-12-20 08:01:57,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:01:57,542 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:57,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:01:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-20 08:01:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 23. [2023-12-20 08:01:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-20 08:01:57,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2023-12-20 08:01:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:57,549 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-20 08:01:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-20 08:01:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 08:01:57,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:57,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:57,566 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 08:01:57,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:57,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:57,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1443181976, now seen corresponding path program 4 times [2023-12-20 08:01:57,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:57,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095121285] [2023-12-20 08:01:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:57,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:57,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095121285] [2023-12-20 08:01:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095121285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989817034] [2023-12-20 08:01:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:01:57,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:57,978 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 08:01:58,015 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 08:01:58,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:01:58,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:58,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-20 08:01:58,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:58,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 08:01:58,236 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:01:58,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-12-20 08:01:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:58,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:58,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-20 08:01:58,409 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 26 treesize of output 20 [2023-12-20 08:01:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:58,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989817034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:58,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:58,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2023-12-20 08:01:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889700199] [2023-12-20 08:01:58,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 08:01:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 08:01:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-12-20 08:01:58,466 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:58,947 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-12-20 08:01:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 08:01:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-20 08:01:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:58,948 INFO L225 Difference]: With dead ends: 67 [2023-12-20 08:01:58,948 INFO L226 Difference]: Without dead ends: 52 [2023-12-20 08:01:58,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 08:01:58,968 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:58,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 99 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:01:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-20 08:01:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2023-12-20 08:01:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-20 08:01:58,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 22 [2023-12-20 08:01:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:58,975 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-20 08:01:58,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:01:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-20 08:01:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 08:01:58,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:58,976 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:58,994 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 08:01:59,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:59,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:59,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2093765608, now seen corresponding path program 5 times [2023-12-20 08:01:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:59,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327313463] [2023-12-20 08:01:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:59,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327313463] [2023-12-20 08:01:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327313463] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980811679] [2023-12-20 08:01:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:01:59,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:59,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:59,435 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 08:01:59,448 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 08:01:59,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-20 08:01:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:59,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 08:01:59,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:59,576 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 08:01:59,596 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 08:01:59,603 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 08:01:59,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:59,635 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 08:01:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:59,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:59,912 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 08:01:59,916 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 918 treesize of output 886 [2023-12-20 08:01:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:59,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980811679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:59,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:59,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2023-12-20 08:01:59,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716065993] [2023-12-20 08:01:59,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:59,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:01:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:01:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:01:59,993 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:00,592 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2023-12-20 08:02:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 08:02:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-20 08:02:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:00,593 INFO L225 Difference]: With dead ends: 77 [2023-12-20 08:02:00,593 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 08:02:00,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 08:02:00,594 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:00,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 120 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:02:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 08:02:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2023-12-20 08:02:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-20 08:02:00,601 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2023-12-20 08:02:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:00,601 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-20 08:02:00,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-20 08:02:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 08:02:00,602 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:00,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:00,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 08:02:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:00,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2104111834, now seen corresponding path program 6 times [2023-12-20 08:02:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241237659] [2023-12-20 08:02:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:00,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:00,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241237659] [2023-12-20 08:02:00,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241237659] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:00,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623542489] [2023-12-20 08:02:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:02:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:00,995 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 08:02:01,030 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 08:02:01,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 08:02:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:01,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 08:02:01,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:01,101 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 08:02:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:01,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:01,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 08:02:01,314 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 20 treesize of output 16 [2023-12-20 08:02:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:01,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623542489] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:01,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:01,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-12-20 08:02:01,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59423472] [2023-12-20 08:02:01,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:01,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 08:02:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:01,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 08:02:01,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-12-20 08:02:01,370 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:01,626 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2023-12-20 08:02:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 08:02:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-20 08:02:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:01,627 INFO L225 Difference]: With dead ends: 100 [2023-12-20 08:02:01,627 INFO L226 Difference]: Without dead ends: 98 [2023-12-20 08:02:01,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:02:01,628 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 116 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:02:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-20 08:02:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 50. [2023-12-20 08:02:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-20 08:02:01,635 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 28 [2023-12-20 08:02:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-20 08:02:01,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-20 08:02:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 08:02:01,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:01,636 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:01,641 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 08:02:01,841 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,SelfDestructingSolverStorable9 [2023-12-20 08:02:01,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:01,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1457375084, now seen corresponding path program 7 times [2023-12-20 08:02:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844643439] [2023-12-20 08:02:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:01,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844643439] [2023-12-20 08:02:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844643439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188085198] [2023-12-20 08:02:01,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:02:01,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:01,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:01,946 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 08:02:01,972 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 08:02:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:01,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-20 08:02:01,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:02,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188085198] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:02,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-12-20 08:02:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931875218] [2023-12-20 08:02:02,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 08:02:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 08:02:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-20 08:02:02,173 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:02,270 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2023-12-20 08:02:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 08:02:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-20 08:02:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:02,280 INFO L225 Difference]: With dead ends: 82 [2023-12-20 08:02:02,280 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 08:02:02,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-12-20 08:02:02,281 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:02,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 08:02:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2023-12-20 08:02:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-20 08:02:02,287 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2023-12-20 08:02:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:02,287 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-20 08:02:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-20 08:02:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 08:02:02,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:02,288 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:02,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 08:02:02,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:02,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:02,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash 549115882, now seen corresponding path program 8 times [2023-12-20 08:02:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:02,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580782315] [2023-12-20 08:02:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580782315] [2023-12-20 08:02:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580782315] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731267046] [2023-12-20 08:02:02,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:02:02,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:02,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:02,976 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 08:02:02,979 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 08:02:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:02:03,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:03,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-20 08:02:03,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:03,067 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 08:02:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,089 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 31 treesize of output 11 [2023-12-20 08:02:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,097 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 21 treesize of output 20 [2023-12-20 08:02:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:03,139 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 40 treesize of output 23 [2023-12-20 08:02:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:03,170 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 30 treesize of output 32 [2023-12-20 08:02:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:03,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:03,252 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 39 treesize of output 44 [2023-12-20 08:02:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:03,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:03,912 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 46 treesize of output 44 [2023-12-20 08:02:03,918 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 53750 treesize of output 53238 [2023-12-20 08:02:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:02:04,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731267046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:04,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:04,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 38 [2023-12-20 08:02:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171128645] [2023-12-20 08:02:04,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:04,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:02:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:02:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:02:04,066 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:04,726 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-12-20 08:02:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 08:02:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-20 08:02:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:04,727 INFO L225 Difference]: With dead ends: 73 [2023-12-20 08:02:04,727 INFO L226 Difference]: Without dead ends: 71 [2023-12-20 08:02:04,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=2119, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 08:02:04,728 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:04,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:02:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-20 08:02:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2023-12-20 08:02:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-20 08:02:04,736 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2023-12-20 08:02:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:04,736 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-20 08:02:04,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-20 08:02:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 08:02:04,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:04,737 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:04,744 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 08:02:04,943 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,SelfDestructingSolverStorable11 [2023-12-20 08:02:04,944 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:04,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash -29622102, now seen corresponding path program 9 times [2023-12-20 08:02:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377020698] [2023-12-20 08:02:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377020698] [2023-12-20 08:02:05,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377020698] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726227720] [2023-12-20 08:02:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:02:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:05,051 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 08:02:05,076 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 08:02:05,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 08:02:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:05,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-20 08:02:05,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:05,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:05,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726227720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:05,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:05,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-12-20 08:02:05,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549539541] [2023-12-20 08:02:05,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 08:02:05,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 08:02:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-12-20 08:02:05,364 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:05,463 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2023-12-20 08:02:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 08:02:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-20 08:02:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:05,466 INFO L225 Difference]: With dead ends: 88 [2023-12-20 08:02:05,466 INFO L226 Difference]: Without dead ends: 64 [2023-12-20 08:02:05,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2023-12-20 08:02:05,467 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:05,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-20 08:02:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2023-12-20 08:02:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-20 08:02:05,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2023-12-20 08:02:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:05,482 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-20 08:02:05,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-20 08:02:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 08:02:05,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:05,487 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:05,495 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 08:02:05,692 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,SelfDestructingSolverStorable12 [2023-12-20 08:02:05,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:05,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -813853144, now seen corresponding path program 10 times [2023-12-20 08:02:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417837882] [2023-12-20 08:02:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417837882] [2023-12-20 08:02:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417837882] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:06,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501507528] [2023-12-20 08:02:06,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:02:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:06,046 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 08:02:06,068 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 08:02:06,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:02:06,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:06,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-20 08:02:06,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:06,210 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 13 treesize of output 9 [2023-12-20 08:02:06,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-20 08:02:06,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-20 08:02:06,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:06,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 08:02:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:06,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:06,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-12-20 08:02:06,846 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 102 treesize of output 94 [2023-12-20 08:02:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:02:07,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501507528] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:07,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:07,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 41 [2023-12-20 08:02:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826836095] [2023-12-20 08:02:07,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:07,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 08:02:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 08:02:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:02:07,007 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:07,827 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2023-12-20 08:02:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-20 08:02:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-20 08:02:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:07,828 INFO L225 Difference]: With dead ends: 95 [2023-12-20 08:02:07,828 INFO L226 Difference]: Without dead ends: 66 [2023-12-20 08:02:07,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=3776, Unknown=0, NotChecked=0, Total=4556 [2023-12-20 08:02:07,829 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 102 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:07,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 160 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:02:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-20 08:02:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2023-12-20 08:02:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-20 08:02:07,839 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2023-12-20 08:02:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:07,840 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-20 08:02:07,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-20 08:02:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 08:02:07,840 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:07,840 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:07,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-20 08:02:08,045 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,SelfDestructingSolverStorable13 [2023-12-20 08:02:08,045 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:08,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1011525862, now seen corresponding path program 11 times [2023-12-20 08:02:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:08,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772588863] [2023-12-20 08:02:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772588863] [2023-12-20 08:02:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772588863] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424271572] [2023-12-20 08:02:08,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:02:08,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:08,288 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 08:02:08,304 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 08:02:08,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 08:02:08,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:08,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-20 08:02:08,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:08,504 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 08:02:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:08,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:08,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 08:02:08,857 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 20 treesize of output 16 [2023-12-20 08:02:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424271572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:08,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:08,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 33 [2023-12-20 08:02:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248221953] [2023-12-20 08:02:08,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:08,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 08:02:08,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 08:02:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 08:02:08,877 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:09,322 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-12-20 08:02:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-20 08:02:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-20 08:02:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:09,323 INFO L225 Difference]: With dead ends: 81 [2023-12-20 08:02:09,323 INFO L226 Difference]: Without dead ends: 79 [2023-12-20 08:02:09,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=2030, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:02:09,324 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:09,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 177 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:02:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-20 08:02:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 53. [2023-12-20 08:02:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-12-20 08:02:09,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2023-12-20 08:02:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:09,334 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-12-20 08:02:09,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-12-20 08:02:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 08:02:09,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:09,335 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:09,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 08:02:09,540 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,SelfDestructingSolverStorable14 [2023-12-20 08:02:09,540 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:09,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash 881742764, now seen corresponding path program 12 times [2023-12-20 08:02:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:09,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566441252] [2023-12-20 08:02:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:09,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566441252] [2023-12-20 08:02:09,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566441252] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907951870] [2023-12-20 08:02:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:02:09,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:09,694 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 08:02:09,731 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 08:02:09,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 08:02:09,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:09,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 08:02:09,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:10,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907951870] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:10,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2023-12-20 08:02:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712955097] [2023-12-20 08:02:10,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:10,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 08:02:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 08:02:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:02:10,129 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:10,251 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2023-12-20 08:02:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 08:02:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-20 08:02:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:10,252 INFO L225 Difference]: With dead ends: 80 [2023-12-20 08:02:10,252 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 08:02:10,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:02:10,254 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:10,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 55 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 08:02:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-12-20 08:02:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-20 08:02:10,264 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2023-12-20 08:02:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:10,265 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-20 08:02:10,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-20 08:02:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 08:02:10,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:10,266 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:10,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 08:02:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:10,471 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:10,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1616695910, now seen corresponding path program 13 times [2023-12-20 08:02:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:10,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334960685] [2023-12-20 08:02:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334960685] [2023-12-20 08:02:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334960685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728545259] [2023-12-20 08:02:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:02:10,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:10,838 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 08:02:10,891 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 08:02:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:10,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-20 08:02:10,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:11,087 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 08:02:11,114 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 08:02:11,122 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 08:02:11,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:11,159 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 08:02:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:11,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:11,602 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 08:02:11,611 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 206 treesize of output 198 [2023-12-20 08:02:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 5 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:11,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728545259] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:11,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:11,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2023-12-20 08:02:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439884893] [2023-12-20 08:02:11,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 08:02:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 08:02:11,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 08:02:11,804 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:12,460 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-12-20 08:02:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-20 08:02:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-20 08:02:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:12,460 INFO L225 Difference]: With dead ends: 92 [2023-12-20 08:02:12,460 INFO L226 Difference]: Without dead ends: 90 [2023-12-20 08:02:12,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2023-12-20 08:02:12,462 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:12,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 163 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:02:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-20 08:02:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2023-12-20 08:02:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-12-20 08:02:12,479 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 46 [2023-12-20 08:02:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:12,479 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-12-20 08:02:12,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-12-20 08:02:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 08:02:12,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:12,479 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:12,487 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 08:02:12,684 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,SelfDestructingSolverStorable16 [2023-12-20 08:02:12,685 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:12,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash 169754796, now seen corresponding path program 14 times [2023-12-20 08:02:12,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:12,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61098356] [2023-12-20 08:02:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:12,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 4 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:13,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:13,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61098356] [2023-12-20 08:02:13,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61098356] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:13,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853019996] [2023-12-20 08:02:13,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:02:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:13,244 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 08:02:13,252 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 08:02:13,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:02:13,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:13,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-20 08:02:13,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:13,494 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 08:02:13,524 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 08:02:13,531 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 08:02:13,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:13,570 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 30 treesize of output 21 [2023-12-20 08:02:13,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:13,581 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 08:02:13,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:13,626 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 08:02:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:14,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:14,172 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 46 treesize of output 44 [2023-12-20 08:02:14,176 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 414 treesize of output 406 [2023-12-20 08:02:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853019996] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:14,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 50 [2023-12-20 08:02:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702087211] [2023-12-20 08:02:14,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 08:02:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 08:02:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:02:14,387 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 50 states, 50 states have (on average 2.8) internal successors, (140), 50 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:15,744 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2023-12-20 08:02:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-20 08:02:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.8) internal successors, (140), 50 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-20 08:02:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:15,745 INFO L225 Difference]: With dead ends: 141 [2023-12-20 08:02:15,745 INFO L226 Difference]: Without dead ends: 139 [2023-12-20 08:02:15,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=959, Invalid=7783, Unknown=0, NotChecked=0, Total=8742 [2023-12-20 08:02:15,747 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:15,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 394 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 08:02:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-20 08:02:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 80. [2023-12-20 08:02:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 79 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-12-20 08:02:15,782 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 55 [2023-12-20 08:02:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:15,782 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-12-20 08:02:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.8) internal successors, (140), 50 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-12-20 08:02:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 08:02:15,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:15,782 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:15,801 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 08:02:15,987 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,SelfDestructingSolverStorable17 [2023-12-20 08:02:15,988 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:15,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2122248172, now seen corresponding path program 15 times [2023-12-20 08:02:15,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:15,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569555873] [2023-12-20 08:02:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:16,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:16,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569555873] [2023-12-20 08:02:16,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569555873] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:16,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922379982] [2023-12-20 08:02:16,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:02:16,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:16,189 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 08:02:16,215 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 08:02:16,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 08:02:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:16,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 08:02:16,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:16,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922379982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:16,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2023-12-20 08:02:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289673888] [2023-12-20 08:02:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 08:02:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 08:02:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:02:16,783 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:16,959 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2023-12-20 08:02:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 08:02:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-20 08:02:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:16,960 INFO L225 Difference]: With dead ends: 162 [2023-12-20 08:02:16,960 INFO L226 Difference]: Without dead ends: 129 [2023-12-20 08:02:16,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:02:16,961 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:16,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 94 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-20 08:02:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 80. [2023-12-20 08:02:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-12-20 08:02:16,980 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 55 [2023-12-20 08:02:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:16,980 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-12-20 08:02:16,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-12-20 08:02:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 08:02:16,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:16,980 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:16,990 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 08:02:17,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:17,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:17,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:17,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1725791960, now seen corresponding path program 16 times [2023-12-20 08:02:17,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:17,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249908150] [2023-12-20 08:02:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:17,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249908150] [2023-12-20 08:02:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249908150] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788571035] [2023-12-20 08:02:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:02:17,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:17,604 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 08:02:17,633 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 08:02:17,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:02:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:17,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-20 08:02:17,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:18,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 08:02:18,593 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:02:18,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-12-20 08:02:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 92 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:18,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:19,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-20 08:02:19,150 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 26 treesize of output 20 [2023-12-20 08:02:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 84 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788571035] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:19,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:19,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 54 [2023-12-20 08:02:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192838195] [2023-12-20 08:02:19,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-20 08:02:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-20 08:02:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2525, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:02:19,310 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:21,085 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2023-12-20 08:02:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-20 08:02:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-20 08:02:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:21,086 INFO L225 Difference]: With dead ends: 178 [2023-12-20 08:02:21,086 INFO L226 Difference]: Without dead ends: 145 [2023-12-20 08:02:21,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1177, Invalid=9535, Unknown=0, NotChecked=0, Total=10712 [2023-12-20 08:02:21,088 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 345 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1367 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 08:02:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-20 08:02:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 77. [2023-12-20 08:02:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-12-20 08:02:21,106 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 58 [2023-12-20 08:02:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:21,106 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-12-20 08:02:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-12-20 08:02:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 08:02:21,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:21,107 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:21,113 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 08:02:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:21,313 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:21,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1723586650, now seen corresponding path program 17 times [2023-12-20 08:02:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440497994] [2023-12-20 08:02:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 10 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440497994] [2023-12-20 08:02:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440497994] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482909085] [2023-12-20 08:02:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:02:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:21,970 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 08:02:21,974 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 08:02:22,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-20 08:02:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:22,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-20 08:02:22,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:22,562 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 08:02:22,593 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 08:02:22,599 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 08:02:22,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:22,638 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 30 treesize of output 21 [2023-12-20 08:02:22,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:22,647 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 08:02:22,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:22,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 08:02:22,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:22,715 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 08:02:22,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:22,784 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 08:02:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:23,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:23,485 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 56 treesize of output 54 [2023-12-20 08:02:23,488 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 6710 treesize of output 6646 [2023-12-20 08:02:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482909085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:23,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 60 [2023-12-20 08:02:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058234630] [2023-12-20 08:02:23,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-20 08:02:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-20 08:02:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=3110, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:02:23,786 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:25,599 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2023-12-20 08:02:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-20 08:02:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-20 08:02:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:25,599 INFO L225 Difference]: With dead ends: 167 [2023-12-20 08:02:25,599 INFO L226 Difference]: Without dead ends: 165 [2023-12-20 08:02:25,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 82 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1361, Invalid=11979, Unknown=0, NotChecked=0, Total=13340 [2023-12-20 08:02:25,601 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 231 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:25,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 481 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 08:02:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-20 08:02:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 92. [2023-12-20 08:02:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.065934065934066) internal successors, (97), 91 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2023-12-20 08:02:25,623 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 64 [2023-12-20 08:02:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:25,624 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2023-12-20 08:02:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 60 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2023-12-20 08:02:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 08:02:25,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:25,624 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:25,631 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 08:02:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:25,832 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 184785964, now seen corresponding path program 18 times [2023-12-20 08:02:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:25,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490015291] [2023-12-20 08:02:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:26,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:26,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490015291] [2023-12-20 08:02:26,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490015291] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:26,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859169619] [2023-12-20 08:02:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:02:26,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:26,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:26,084 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 08:02:26,108 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 08:02:26,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-20 08:02:26,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:26,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-20 08:02:26,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:26,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:26,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859169619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:26,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:26,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2023-12-20 08:02:26,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857900682] [2023-12-20 08:02:26,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:26,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-20 08:02:26,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-20 08:02:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 08:02:26,933 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:27,123 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2023-12-20 08:02:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 08:02:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-20 08:02:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:27,125 INFO L225 Difference]: With dead ends: 194 [2023-12-20 08:02:27,125 INFO L226 Difference]: Without dead ends: 155 [2023-12-20 08:02:27,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:02:27,126 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:27,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 110 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-20 08:02:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 92. [2023-12-20 08:02:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-20 08:02:27,148 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 67 [2023-12-20 08:02:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:27,148 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-20 08:02:27,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-20 08:02:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 08:02:27,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:27,149 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:27,155 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 08:02:27,355 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,SelfDestructingSolverStorable21 [2023-12-20 08:02:27,355 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:27,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1720398696, now seen corresponding path program 19 times [2023-12-20 08:02:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:27,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721121186] [2023-12-20 08:02:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:27,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721121186] [2023-12-20 08:02:27,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721121186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104841640] [2023-12-20 08:02:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:02:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:27,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:27,783 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 08:02:27,783 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 08:02:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:27,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-20 08:02:27,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:28,187 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 08:02:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:28,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:28,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 08:02:28,787 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 20 treesize of output 16 [2023-12-20 08:02:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104841640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:28,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:28,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-12-20 08:02:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531546437] [2023-12-20 08:02:28,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:28,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-20 08:02:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-20 08:02:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 08:02:28,813 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:29,715 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2023-12-20 08:02:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-20 08:02:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-20 08:02:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:29,718 INFO L225 Difference]: With dead ends: 209 [2023-12-20 08:02:29,718 INFO L226 Difference]: Without dead ends: 207 [2023-12-20 08:02:29,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=5059, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 08:02:29,719 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:29,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 588 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 08:02:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-20 08:02:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 92. [2023-12-20 08:02:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-20 08:02:29,763 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 70 [2023-12-20 08:02:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:29,764 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-20 08:02:29,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-20 08:02:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 08:02:29,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:29,765 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:29,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 08:02:29,970 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,SelfDestructingSolverStorable22 [2023-12-20 08:02:29,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2047655060, now seen corresponding path program 20 times [2023-12-20 08:02:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522664282] [2023-12-20 08:02:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:29,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 19 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:30,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522664282] [2023-12-20 08:02:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522664282] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423239764] [2023-12-20 08:02:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:02:30,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:31,004 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 08:02:31,029 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 08:02:31,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:02:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:31,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-20 08:02:31,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:31,191 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 08:02:31,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 08:02:31,222 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 08:02:31,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,263 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 30 treesize of output 21 [2023-12-20 08:02:31,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,270 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 08:02:31,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 08:02:31,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,310 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 08:02:31,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,347 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 44 treesize of output 41 [2023-12-20 08:02:31,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,357 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 08:02:31,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,400 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 51 treesize of output 51 [2023-12-20 08:02:31,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,411 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 08:02:31,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:31,468 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 08:02:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:32,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:32,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2023-12-20 08:02:32,896 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 1749024758 treesize of output 1744830454 [2023-12-20 08:02:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 51 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423239764] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:34,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:34,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 70 [2023-12-20 08:02:34,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97047346] [2023-12-20 08:02:34,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-12-20 08:02:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-12-20 08:02:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=4184, Unknown=0, NotChecked=0, Total=4830 [2023-12-20 08:02:34,625 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 70 states, 70 states have (on average 2.7142857142857144) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:37,354 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2023-12-20 08:02:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-20 08:02:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.7142857142857144) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-12-20 08:02:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:37,355 INFO L225 Difference]: With dead ends: 228 [2023-12-20 08:02:37,355 INFO L226 Difference]: Without dead ends: 226 [2023-12-20 08:02:37,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4444 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2117, Invalid=15175, Unknown=0, NotChecked=0, Total=17292 [2023-12-20 08:02:37,357 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 342 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 642 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 08:02:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-20 08:02:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 107. [2023-12-20 08:02:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2023-12-20 08:02:37,390 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 73 [2023-12-20 08:02:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:37,390 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2023-12-20 08:02:37,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.7142857142857144) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2023-12-20 08:02:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 08:02:37,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:37,391 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:37,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-20 08:02:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:37,595 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:37,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 558146026, now seen corresponding path program 21 times [2023-12-20 08:02:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:37,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166694176] [2023-12-20 08:02:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:37,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166694176] [2023-12-20 08:02:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166694176] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628746385] [2023-12-20 08:02:37,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:02:37,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:37,917 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 08:02:37,941 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 08:02:38,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-20 08:02:38,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:38,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-20 08:02:38,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:38,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628746385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:38,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:38,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2023-12-20 08:02:38,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364815339] [2023-12-20 08:02:38,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:38,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 08:02:38,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 08:02:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:02:38,814 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:39,106 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2023-12-20 08:02:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 08:02:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-12-20 08:02:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:39,107 INFO L225 Difference]: With dead ends: 216 [2023-12-20 08:02:39,107 INFO L226 Difference]: Without dead ends: 174 [2023-12-20 08:02:39,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 110 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 08:02:39,108 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 84 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:39,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 127 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-20 08:02:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 104. [2023-12-20 08:02:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.058252427184466) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2023-12-20 08:02:39,140 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 73 [2023-12-20 08:02:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2023-12-20 08:02:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2023-12-20 08:02:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-20 08:02:39,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:39,141 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:39,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 08:02:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:39,347 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1318037396, now seen corresponding path program 22 times [2023-12-20 08:02:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633845557] [2023-12-20 08:02:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633845557] [2023-12-20 08:02:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633845557] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253079499] [2023-12-20 08:02:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:02:39,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:39,700 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 08:02:39,702 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 08:02:40,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:02:40,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:40,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 08:02:40,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:40,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253079499] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:40,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:40,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2023-12-20 08:02:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252748690] [2023-12-20 08:02:40,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:40,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-20 08:02:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-20 08:02:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 08:02:40,788 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:41,080 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2023-12-20 08:02:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 08:02:41,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-12-20 08:02:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:41,081 INFO L225 Difference]: With dead ends: 226 [2023-12-20 08:02:41,081 INFO L226 Difference]: Without dead ends: 181 [2023-12-20 08:02:41,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 119 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 08:02:41,082 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:41,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 108 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:02:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-20 08:02:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 104. [2023-12-20 08:02:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2023-12-20 08:02:41,115 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 79 [2023-12-20 08:02:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:41,115 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2023-12-20 08:02:41,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2023-12-20 08:02:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 08:02:41,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:41,115 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:41,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-20 08:02:41,322 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,SelfDestructingSolverStorable25 [2023-12-20 08:02:41,322 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1476408090, now seen corresponding path program 23 times [2023-12-20 08:02:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656123775] [2023-12-20 08:02:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 31 proven. 471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:42,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656123775] [2023-12-20 08:02:42,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656123775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:42,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146410567] [2023-12-20 08:02:42,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:02:42,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:42,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:42,413 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 08:02:42,414 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 08:02:43,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-20 08:02:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:43,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-20 08:02:43,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:43,572 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 08:02:43,606 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 08:02:43,613 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 08:02:43,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,654 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 30 treesize of output 21 [2023-12-20 08:02:43,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,664 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 08:02:43,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 08:02:43,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,723 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 08:02:43,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,788 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 44 treesize of output 41 [2023-12-20 08:02:43,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,801 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 08:02:43,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,866 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 51 treesize of output 51 [2023-12-20 08:02:43,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,880 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 08:02:43,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:43,955 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 08:02:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:44,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:45,307 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 76 treesize of output 74 [2023-12-20 08:02:45,371 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 54657014 treesize of output 54525942 [2023-12-20 08:02:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 51 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:46,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146410567] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:46,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:46,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 76 [2023-12-20 08:02:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668232044] [2023-12-20 08:02:46,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:46,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-20 08:02:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-20 08:02:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=5021, Unknown=0, NotChecked=0, Total=5700 [2023-12-20 08:02:46,245 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 76 states, 76 states have (on average 2.8157894736842106) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:49,130 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2023-12-20 08:02:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-20 08:02:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8157894736842106) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-20 08:02:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:49,131 INFO L225 Difference]: With dead ends: 257 [2023-12-20 08:02:49,132 INFO L226 Difference]: Without dead ends: 255 [2023-12-20 08:02:49,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 106 SyntacticMatches, 17 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7013 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2169, Invalid=20181, Unknown=0, NotChecked=0, Total=22350 [2023-12-20 08:02:49,135 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 370 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 3991 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:49,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 844 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3991 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 08:02:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-20 08:02:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 119. [2023-12-20 08:02:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2023-12-20 08:02:49,180 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 82 [2023-12-20 08:02:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:49,180 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2023-12-20 08:02:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8157894736842106) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2023-12-20 08:02:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 08:02:49,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:49,181 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:49,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-20 08:02:49,383 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,SelfDestructingSolverStorable26 [2023-12-20 08:02:49,383 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash 704837032, now seen corresponding path program 24 times [2023-12-20 08:02:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214954405] [2023-12-20 08:02:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:50,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214954405] [2023-12-20 08:02:50,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214954405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:50,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488691048] [2023-12-20 08:02:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:02:50,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:50,077 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 08:02:50,084 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 08:02:50,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-12-20 08:02:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:02:50,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-20 08:02:50,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:50,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 08:02:51,702 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:02:51,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-12-20 08:02:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 202 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:51,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:02:52,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-20 08:02:52,698 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 26 treesize of output 20 [2023-12-20 08:02:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 195 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488691048] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:02:53,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:02:53,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2023-12-20 08:02:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197125008] [2023-12-20 08:02:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:02:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-20 08:02:53,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:02:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-20 08:02:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=4956, Unknown=0, NotChecked=0, Total=5700 [2023-12-20 08:02:53,005 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 76 states, 76 states have (on average 2.6710526315789473) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:02:56,022 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2023-12-20 08:02:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-12-20 08:02:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6710526315789473) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-20 08:02:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:02:56,023 INFO L225 Difference]: With dead ends: 294 [2023-12-20 08:02:56,023 INFO L226 Difference]: Without dead ends: 249 [2023-12-20 08:02:56,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6183 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2698, Invalid=18764, Unknown=0, NotChecked=0, Total=21462 [2023-12-20 08:02:56,025 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:02:56,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 249 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 08:02:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-20 08:02:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 116. [2023-12-20 08:02:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0521739130434782) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2023-12-20 08:02:56,068 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 82 [2023-12-20 08:02:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:02:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2023-12-20 08:02:56,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6710526315789473) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:02:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2023-12-20 08:02:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 08:02:56,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:02:56,069 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:02:56,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 08:02:56,275 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,SelfDestructingSolverStorable27 [2023-12-20 08:02:56,276 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:02:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:02:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1941567020, now seen corresponding path program 25 times [2023-12-20 08:02:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:02:56,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228359788] [2023-12-20 08:02:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:02:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:02:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 46 proven. 586 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:02:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228359788] [2023-12-20 08:02:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228359788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:02:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358834710] [2023-12-20 08:02:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:02:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:02:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:02:57,635 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 08:02:57,646 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 08:02:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:02:57,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-20 08:02:57,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:02:58,125 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 08:02:58,161 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 08:02:58,167 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 08:02:58,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,221 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 30 treesize of output 21 [2023-12-20 08:02:58,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,228 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 08:02:58,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 08:02:58,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,290 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 08:02:58,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,349 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 44 treesize of output 41 [2023-12-20 08:02:58,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,363 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 08:02:58,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,431 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 51 treesize of output 51 [2023-12-20 08:02:58,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,442 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 08:02:58,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,502 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 58 treesize of output 61 [2023-12-20 08:02:58,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,520 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 08:02:58,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:58,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-12-20 08:02:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:02:59,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:00,226 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 86 treesize of output 84 [2023-12-20 08:03:00,772 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 55901683702 treesize of output 55834574838 [2023-12-20 08:03:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 70 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358834710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:04,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:04,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 84 [2023-12-20 08:03:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662326864] [2023-12-20 08:03:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-20 08:03:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-20 08:03:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=6144, Unknown=0, NotChecked=0, Total=6972 [2023-12-20 08:03:04,652 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:08,879 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2023-12-20 08:03:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-20 08:03:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-20 08:03:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:08,880 INFO L225 Difference]: With dead ends: 292 [2023-12-20 08:03:08,880 INFO L226 Difference]: Without dead ends: 290 [2023-12-20 08:03:08,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 119 SyntacticMatches, 18 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8710 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2645, Invalid=25077, Unknown=0, NotChecked=0, Total=27722 [2023-12-20 08:03:08,883 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 424 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 5080 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 5080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:08,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1099 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 5080 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 08:03:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-20 08:03:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 131. [2023-12-20 08:03:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 130 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2023-12-20 08:03:08,957 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 91 [2023-12-20 08:03:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:08,957 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2023-12-20 08:03:08,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2023-12-20 08:03:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 08:03:08,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:08,958 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:08,964 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 08:03:09,163 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,SelfDestructingSolverStorable28 [2023-12-20 08:03:09,163 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:09,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1978063700, now seen corresponding path program 26 times [2023-12-20 08:03:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:09,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717947077] [2023-12-20 08:03:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:09,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717947077] [2023-12-20 08:03:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717947077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357863511] [2023-12-20 08:03:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:09,697 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 08:03:09,719 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 08:03:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:09,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-20 08:03:09,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:10,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357863511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:10,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:10,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2023-12-20 08:03:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053384538] [2023-12-20 08:03:10,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:10,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 08:03:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 08:03:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 08:03:10,617 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:11,066 INFO L93 Difference]: Finished difference Result 313 states and 320 transitions. [2023-12-20 08:03:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-20 08:03:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-20 08:03:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:11,067 INFO L225 Difference]: With dead ends: 313 [2023-12-20 08:03:11,067 INFO L226 Difference]: Without dead ends: 262 [2023-12-20 08:03:11,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 137 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2023-12-20 08:03:11,068 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:11,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 133 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-20 08:03:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 131. [2023-12-20 08:03:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2023-12-20 08:03:11,125 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 91 [2023-12-20 08:03:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:11,125 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2023-12-20 08:03:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2023-12-20 08:03:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-20 08:03:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:11,125 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:11,131 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 08:03:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:11,330 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:11,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash -111294488, now seen corresponding path program 27 times [2023-12-20 08:03:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273901994] [2023-12-20 08:03:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273901994] [2023-12-20 08:03:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273901994] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054134434] [2023-12-20 08:03:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:03:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:12,208 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 08:03:12,210 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 08:03:13,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-20 08:03:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:13,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-20 08:03:13,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:14,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 08:03:15,117 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-12-20 08:03:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 287 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:15,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:16,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-20 08:03:16,328 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 26 treesize of output 20 [2023-12-20 08:03:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 273 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:16,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054134434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:16,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:16,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 84 [2023-12-20 08:03:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062781760] [2023-12-20 08:03:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:16,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-20 08:03:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-20 08:03:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=6200, Unknown=0, NotChecked=0, Total=6972 [2023-12-20 08:03:16,829 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:20,619 INFO L93 Difference]: Finished difference Result 332 states and 338 transitions. [2023-12-20 08:03:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-12-20 08:03:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-12-20 08:03:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:20,621 INFO L225 Difference]: With dead ends: 332 [2023-12-20 08:03:20,621 INFO L226 Difference]: Without dead ends: 281 [2023-12-20 08:03:20,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5532 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2551, Invalid=24181, Unknown=0, NotChecked=0, Total=26732 [2023-12-20 08:03:20,624 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 379 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:20,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 924 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 08:03:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-12-20 08:03:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 128. [2023-12-20 08:03:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2023-12-20 08:03:20,679 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 94 [2023-12-20 08:03:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:20,679 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2023-12-20 08:03:20,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2023-12-20 08:03:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-20 08:03:20,679 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:20,679 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:20,689 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 08:03:20,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:20,887 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:20,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:20,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2075934170, now seen corresponding path program 28 times [2023-12-20 08:03:20,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:20,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215331809] [2023-12-20 08:03:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:20,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 46 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:22,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215331809] [2023-12-20 08:03:22,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215331809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883590115] [2023-12-20 08:03:22,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:03:22,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:22,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:22,408 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 08:03:22,430 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 08:03:25,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:03:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:25,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-20 08:03:25,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:25,816 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 13 treesize of output 9 [2023-12-20 08:03:25,874 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-20 08:03:25,875 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 35 treesize of output 13 [2023-12-20 08:03:25,884 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-20 08:03:25,884 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 25 treesize of output 24 [2023-12-20 08:03:25,975 INFO L349 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2023-12-20 08:03:25,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2023-12-20 08:03:26,033 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2023-12-20 08:03:26,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2023-12-20 08:03:26,124 INFO L349 Elim1Store]: treesize reduction 117, result has 21.5 percent of original size [2023-12-20 08:03:26,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 41 [2023-12-20 08:03:26,239 INFO L349 Elim1Store]: treesize reduction 82, result has 28.1 percent of original size [2023-12-20 08:03:26,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2023-12-20 08:03:26,338 INFO L349 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2023-12-20 08:03:26,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 55 [2023-12-20 08:03:26,428 INFO L349 Elim1Store]: treesize reduction 126, result has 25.4 percent of original size [2023-12-20 08:03:26,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 66 [2023-12-20 08:03:26,570 INFO L349 Elim1Store]: treesize reduction 239, result has 18.4 percent of original size [2023-12-20 08:03:26,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 69 [2023-12-20 08:03:26,679 INFO L349 Elim1Store]: treesize reduction 178, result has 23.3 percent of original size [2023-12-20 08:03:26,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 80 [2023-12-20 08:03:26,890 INFO L349 Elim1Store]: treesize reduction 312, result has 17.2 percent of original size [2023-12-20 08:03:26,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 83 [2023-12-20 08:03:27,124 INFO L349 Elim1Store]: treesize reduction 238, result has 21.5 percent of original size [2023-12-20 08:03:27,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 94 [2023-12-20 08:03:27,670 INFO L349 Elim1Store]: treesize reduction 393, result has 16.2 percent of original size [2023-12-20 08:03:27,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 101 treesize of output 97 [2023-12-20 08:03:29,448 INFO L349 Elim1Store]: treesize reduction 306, result has 19.9 percent of original size [2023-12-20 08:03:29,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 108 [2023-12-20 08:03:35,746 INFO L349 Elim1Store]: treesize reduction 382, result has 18.6 percent of original size [2023-12-20 08:03:35,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 102 treesize of output 122 [2023-12-20 08:03:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 84 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:53,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:55,557 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 48 treesize of output 46 [2023-12-20 08:03:55,561 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 3391 treesize of output 3327 [2023-12-20 08:03:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 2 proven. 730 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:03:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883590115] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:55,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:55,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 33] total 63 [2023-12-20 08:03:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36283536] [2023-12-20 08:03:55,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:55,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-20 08:03:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-20 08:03:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=3477, Unknown=4, NotChecked=0, Total=3906 [2023-12-20 08:03:55,620 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:04:07,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:12,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:14,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:18,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:23,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:28,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:33,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:34,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:38,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:42,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:46,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:50,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:54,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:58,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:02,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:06,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:10,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:14,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:18,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:23,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:27,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:32,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:33,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:37,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:38,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:42,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:46,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:51,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:53,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:57,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:01,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:02,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:06,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:08,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:12,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:13,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:18,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:22,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:27,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:32,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:37,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:42,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:47,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:52,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:56,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:01,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:06,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:11,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:16,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:21,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:26,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:31,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:35,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:40,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:45,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:50,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:07:55,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:00,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:05,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:10,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:14,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:19,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:24,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:29,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:34,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:39,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:44,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:48,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:53,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:08:58,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:09:03,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:09:08,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:09:13,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:09:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:14,007 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2023-12-20 08:09:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-12-20 08:09:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-12-20 08:09:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:14,008 INFO L225 Difference]: With dead ends: 255 [2023-12-20 08:09:14,008 INFO L226 Difference]: Without dead ends: 253 [2023-12-20 08:09:14,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 144 SyntacticMatches, 36 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4553 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=1215, Invalid=12353, Unknown=4, NotChecked=0, Total=13572 [2023-12-20 08:09:14,010 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 45 mSolverCounterUnsat, 60 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 5173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 60 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 315.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:14,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1774 Invalid, 5173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5068 Invalid, 60 Unknown, 0 Unchecked, 315.6s Time] [2023-12-20 08:09:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-12-20 08:09:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 128. [2023-12-20 08:09:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2023-12-20 08:09:14,073 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 100 [2023-12-20 08:09:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:14,073 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2023-12-20 08:09:14,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2023-12-20 08:09:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 08:09:14,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:14,074 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:14,283 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,SelfDestructingSolverStorable31 [2023-12-20 08:09:14,284 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -915426708, now seen corresponding path program 29 times [2023-12-20 08:09:14,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175835218] [2023-12-20 08:09:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 46 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:15,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:15,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175835218] [2023-12-20 08:09:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175835218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:15,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173498658] [2023-12-20 08:09:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:09:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:15,871 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:09:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 08:09:19,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-12-20 08:09:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:09:19,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-20 08:09:19,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:19,254 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 08:09:19,284 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 08:09:19,289 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 08:09:19,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,324 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 30 treesize of output 21 [2023-12-20 08:09:19,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,334 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 08:09:19,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 08:09:19,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,387 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 08:09:19,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,434 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 44 treesize of output 41 [2023-12-20 08:09:19,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,446 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 08:09:19,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,500 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 51 treesize of output 51 [2023-12-20 08:09:19,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,512 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 08:09:19,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,573 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 58 treesize of output 61 [2023-12-20 08:09:19,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,599 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 08:09:19,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:09:19,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-12-20 08:09:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:20,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:09:21,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 84 [2023-12-20 08:09:21,940 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 13647862 treesize of output 13631478 [2023-12-20 08:09:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 70 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173498658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:09:22,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:09:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 95 [2023-12-20 08:09:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251208806] [2023-12-20 08:09:22,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:09:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-20 08:09:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:09:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-20 08:09:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=7833, Unknown=0, NotChecked=0, Total=8930 [2023-12-20 08:09:22,923 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 95 states, 95 states have (on average 2.789473684210526) internal successors, (265), 95 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:26,443 INFO L93 Difference]: Finished difference Result 322 states and 337 transitions. [2023-12-20 08:09:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-12-20 08:09:26,443 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.789473684210526) internal successors, (265), 95 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-20 08:09:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:26,444 INFO L225 Difference]: With dead ends: 322 [2023-12-20 08:09:26,444 INFO L226 Difference]: Without dead ends: 320 [2023-12-20 08:09:26,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6627 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2474, Invalid=20176, Unknown=0, NotChecked=0, Total=22650 [2023-12-20 08:09:26,447 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 153 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 5804 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:26,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1245 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5804 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-20 08:09:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-20 08:09:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 143. [2023-12-20 08:09:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.056338028169014) internal successors, (150), 142 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2023-12-20 08:09:26,547 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 103 [2023-12-20 08:09:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:26,547 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2023-12-20 08:09:26,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.789473684210526) internal successors, (265), 95 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2023-12-20 08:09:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 08:09:26,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:26,548 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:26,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:26,758 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:26,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 777126124, now seen corresponding path program 30 times [2023-12-20 08:09:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246301088] [2023-12-20 08:09:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246301088] [2023-12-20 08:09:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246301088] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:27,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685239597] [2023-12-20 08:09:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:09:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:27,290 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:09:27,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 08:09:29,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-20 08:09:29,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:09:29,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-20 08:09:29,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:30,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:09:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685239597] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:09:30,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:09:30,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2023-12-20 08:09:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155059454] [2023-12-20 08:09:30,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:09:30,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-20 08:09:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:09:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-20 08:09:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 08:09:30,825 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:31,416 INFO L93 Difference]: Finished difference Result 349 states and 356 transitions. [2023-12-20 08:09:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-20 08:09:31,417 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-20 08:09:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:31,418 INFO L225 Difference]: With dead ends: 349 [2023-12-20 08:09:31,418 INFO L226 Difference]: Without dead ends: 292 [2023-12-20 08:09:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 155 SyntacticMatches, 32 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2023-12-20 08:09:31,419 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:31,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 164 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:09:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-20 08:09:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 143. [2023-12-20 08:09:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 142 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2023-12-20 08:09:31,523 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 103 [2023-12-20 08:09:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:31,524 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2023-12-20 08:09:31,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2023-12-20 08:09:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-20 08:09:31,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:31,524 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:31,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:31,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:31,729 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:31,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash 728738344, now seen corresponding path program 31 times [2023-12-20 08:09:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458656733] [2023-12-20 08:09:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:31,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:32,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458656733] [2023-12-20 08:09:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458656733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426325750] [2023-12-20 08:09:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:09:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:32,701 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:09:32,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 08:09:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:32,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-20 08:09:32,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:33,515 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 08:09:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:34,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:09:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 08:09:34,969 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 20 treesize of output 16 [2023-12-20 08:09:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426325750] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:09:35,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:09:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2023-12-20 08:09:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122292920] [2023-12-20 08:09:35,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:09:35,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-20 08:09:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:09:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-20 08:09:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5295, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 08:09:35,030 INFO L87 Difference]: Start difference. First operand 143 states and 149 transitions. Second operand has 75 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 75 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:37,210 INFO L93 Difference]: Finished difference Result 367 states and 373 transitions. [2023-12-20 08:09:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-20 08:09:37,210 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 75 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-12-20 08:09:37,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:37,211 INFO L225 Difference]: With dead ends: 367 [2023-12-20 08:09:37,211 INFO L226 Difference]: Without dead ends: 365 [2023-12-20 08:09:37,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 158 SyntacticMatches, 17 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3117 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=517, Invalid=11473, Unknown=0, NotChecked=0, Total=11990 [2023-12-20 08:09:37,213 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 4900 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 4954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:37,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1358 Invalid, 4954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4900 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 08:09:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-20 08:09:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 143. [2023-12-20 08:09:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 142 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2023-12-20 08:09:37,306 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 106 [2023-12-20 08:09:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:37,306 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2023-12-20 08:09:37,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 75 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2023-12-20 08:09:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-20 08:09:37,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:37,306 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:37,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:37,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-20 08:09:37,513 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:37,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1210338518, now seen corresponding path program 32 times [2023-12-20 08:09:37,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:37,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862787991] [2023-12-20 08:09:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:37,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 393 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:38,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862787991] [2023-12-20 08:09:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862787991] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954384995] [2023-12-20 08:09:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:09:38,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:38,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:38,060 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:09:38,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 08:09:38,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:09:38,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:09:38,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-20 08:09:38,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:38,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:09:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954384995] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:09:38,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:09:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2023-12-20 08:09:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012149490] [2023-12-20 08:09:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:09:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-20 08:09:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:09:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-20 08:09:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2023-12-20 08:09:38,990 INFO L87 Difference]: Start difference. First operand 143 states and 149 transitions. Second operand has 58 states, 58 states have (on average 2.9310344827586206) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:39,516 INFO L93 Difference]: Finished difference Result 310 states and 316 transitions. [2023-12-20 08:09:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-20 08:09:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9310344827586206) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-12-20 08:09:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:39,517 INFO L225 Difference]: With dead ends: 310 [2023-12-20 08:09:39,517 INFO L226 Difference]: Without dead ends: 250 [2023-12-20 08:09:39,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 164 SyntacticMatches, 34 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2023-12-20 08:09:39,518 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:39,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:09:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-20 08:09:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2023-12-20 08:09:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2023-12-20 08:09:39,621 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 109 [2023-12-20 08:09:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:39,621 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2023-12-20 08:09:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9310344827586206) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:09:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2023-12-20 08:09:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-20 08:09:39,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:39,621 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:39,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:39,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 08:09:39,822 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:39,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash 314531302, now seen corresponding path program 33 times [2023-12-20 08:09:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:39,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792581220] [2023-12-20 08:09:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:39,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 64 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792581220] [2023-12-20 08:09:41,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792581220] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678259835] [2023-12-20 08:09:41,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:09:41,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:41,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:41,607 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:09:41,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 08:09:47,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-12-20 08:09:47,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:09:47,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-20 08:09:47,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:47,421 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 13 treesize of output 9 [2023-12-20 08:09:47,460 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-20 08:09:47,461 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 35 treesize of output 13 [2023-12-20 08:09:47,470 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-20 08:09:47,470 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 25 treesize of output 24 [2023-12-20 08:09:47,539 INFO L349 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2023-12-20 08:09:47,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2023-12-20 08:09:47,595 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2023-12-20 08:09:47,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2023-12-20 08:09:47,683 INFO L349 Elim1Store]: treesize reduction 117, result has 21.5 percent of original size [2023-12-20 08:09:47,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 41 [2023-12-20 08:09:47,755 INFO L349 Elim1Store]: treesize reduction 82, result has 28.1 percent of original size [2023-12-20 08:09:47,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2023-12-20 08:09:47,873 INFO L349 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2023-12-20 08:09:47,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 55 [2023-12-20 08:09:47,967 INFO L349 Elim1Store]: treesize reduction 126, result has 25.4 percent of original size [2023-12-20 08:09:47,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 66 [2023-12-20 08:09:48,130 INFO L349 Elim1Store]: treesize reduction 239, result has 18.4 percent of original size [2023-12-20 08:09:48,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 69 [2023-12-20 08:09:48,257 INFO L349 Elim1Store]: treesize reduction 178, result has 23.3 percent of original size [2023-12-20 08:09:48,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 80 [2023-12-20 08:09:48,520 INFO L349 Elim1Store]: treesize reduction 312, result has 17.2 percent of original size [2023-12-20 08:09:48,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 83 [2023-12-20 08:09:48,779 INFO L349 Elim1Store]: treesize reduction 238, result has 21.5 percent of original size [2023-12-20 08:09:48,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 94 [2023-12-20 08:09:49,332 INFO L349 Elim1Store]: treesize reduction 393, result has 16.2 percent of original size [2023-12-20 08:09:49,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 101 treesize of output 97 [2023-12-20 08:09:52,030 INFO L349 Elim1Store]: treesize reduction 306, result has 19.9 percent of original size [2023-12-20 08:09:52,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 108 [2023-12-20 08:10:01,688 INFO L349 Elim1Store]: treesize reduction 382, result has 18.6 percent of original size [2023-12-20 08:10:01,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 102 treesize of output 122 [2023-12-20 08:10:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 81 proven. 891 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:10:20,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:14:25,102 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 121 treesize of output 119