/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 true -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 [2023-12-18 18:43:31,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:43:31,139 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:43:31,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:43:31,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:43:31,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:43:31,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:43:31,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:43:31,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:43:31,167 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:43:31,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:43:31,167 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:43:31,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:43:31,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:43:31,171 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:43:31,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:43:31,172 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:43:31,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:43:31,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:43:31,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:43:31,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:43:31,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:43:31,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:43:31,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:43:31,176 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:43:31,176 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:43:31,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:43:31,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:43:31,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:43:31,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:43:31,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:43:31,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:43:31,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:43:31,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:43:31,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:43:31,179 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:43:31,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:43:31,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:43:31,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:43:31,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:43:31,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:43:31,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:43:31,374 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:43:31,374 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:43:31,375 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnif.c [2023-12-18 18:43:32,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:43:32,576 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:43:32,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnif.c [2023-12-18 18:43:32,582 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298a9d7e8/b6c79929b069498f8b0d79129e9ee2aa/FLAG221bf7afa [2023-12-18 18:43:32,593 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298a9d7e8/b6c79929b069498f8b0d79129e9ee2aa [2023-12-18 18:43:32,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:43:32,596 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:43:32,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:43:32,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:43:32,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:43:32,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27bb68df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32, skipping insertion in model container [2023-12-18 18:43:32,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:43:32,707 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] [2023-12-18 18:43:32,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:43:32,734 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:43:32,743 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] [2023-12-18 18:43:32,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:43:32,764 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:43:32,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32 WrapperNode [2023-12-18 18:43:32,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:43:32,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:43:32,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:43:32,767 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:43:32,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,799 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-12-18 18:43:32,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:43:32,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:43:32,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:43:32,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:43:32,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,814 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,827 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]. [2023-12-18 18:43:32,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:43:32,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:43:32,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:43:32,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:43:32,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (1/1) ... [2023-12-18 18:43:32,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:43:32,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:32,878 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) [2023-12-18 18:43:32,895 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 [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:43:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 18:43:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:43:32,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:43:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:43:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:43:32,955 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:43:32,957 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:43:33,066 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:43:33,082 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:43:33,083 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 18:43:33,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:43:33 BoogieIcfgContainer [2023-12-18 18:43:33,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:43:33,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:43:33,084 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:43:33,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:43:33,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:43:32" (1/3) ... [2023-12-18 18:43:33,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6672746b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:43:33, skipping insertion in model container [2023-12-18 18:43:33,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:43:32" (2/3) ... [2023-12-18 18:43:33,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6672746b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:43:33, skipping insertion in model container [2023-12-18 18:43:33,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:43:33" (3/3) ... [2023-12-18 18:43:33,088 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2023-12-18 18:43:33,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:43:33,101 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:43:33,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:43:33,145 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;@311c5de5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:43:33,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:43:33,147 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) [2023-12-18 18:43:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-18 18:43:33,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:33,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:33,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:33,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1562928649, now seen corresponding path program 1 times [2023-12-18 18:43:33,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:33,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411356046] [2023-12-18 18:43:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:33,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411356046] [2023-12-18 18:43:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411356046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:43:33,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:43:33,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:43:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654277411] [2023-12-18 18:43:33,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:43:33,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:43:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:43:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:43:33,301 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) [2023-12-18 18:43:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:33,321 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-12-18 18:43:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:43:33,323 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 [2023-12-18 18:43:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:33,328 INFO L225 Difference]: With dead ends: 23 [2023-12-18 18:43:33,329 INFO L226 Difference]: Without dead ends: 11 [2023-12-18 18:43:33,331 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 [2023-12-18 18:43:33,333 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 [2023-12-18 18:43:33,334 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] [2023-12-18 18:43:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-18 18:43:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-18 18:43:33,351 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) [2023-12-18 18:43:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-12-18 18:43:33,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2023-12-18 18:43:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:33,353 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-12-18 18:43:33,353 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) [2023-12-18 18:43:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-12-18 18:43:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-18 18:43:33,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:33,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:43:33,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:33,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1574934422, now seen corresponding path program 1 times [2023-12-18 18:43:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004677858] [2023-12-18 18:43:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:33,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004677858] [2023-12-18 18:43:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004677858] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:43:33,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:43:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:43:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203705767] [2023-12-18 18:43:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:43:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:43:33,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:43:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:43:33,447 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) [2023-12-18 18:43:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:33,465 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-18 18:43:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:43:33,466 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 [2023-12-18 18:43:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:33,466 INFO L225 Difference]: With dead ends: 23 [2023-12-18 18:43:33,466 INFO L226 Difference]: Without dead ends: 14 [2023-12-18 18:43:33,466 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 [2023-12-18 18:43:33,467 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 [2023-12-18 18:43:33,468 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] [2023-12-18 18:43:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-18 18:43:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-12-18 18:43:33,470 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) [2023-12-18 18:43:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 18:43:33,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-12-18 18:43:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:33,471 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 18:43:33,471 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) [2023-12-18 18:43:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 18:43:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 18:43:33,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:33,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:33,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:43:33,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:33,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash -994451034, now seen corresponding path program 1 times [2023-12-18 18:43:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:33,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739283488] [2023-12-18 18:43:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:33,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:33,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:33,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739283488] [2023-12-18 18:43:33,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739283488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:33,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033643362] [2023-12-18 18:43:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:33,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:33,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:33,583 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) [2023-12-18 18:43:33,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:43:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:33,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:43:33,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:33,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033643362] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:33,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:33,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 18:43:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668783205] [2023-12-18 18:43:33,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 18:43:33,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 18:43:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:43:33,772 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) [2023-12-18 18:43:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:33,826 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-12-18 18:43:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 18:43:33,827 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 [2023-12-18 18:43:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:33,827 INFO L225 Difference]: With dead ends: 26 [2023-12-18 18:43:33,827 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 18:43:33,829 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 [2023-12-18 18:43:33,831 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 [2023-12-18 18:43:33,832 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] [2023-12-18 18:43:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 18:43:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-12-18 18:43:33,835 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) [2023-12-18 18:43:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-18 18:43:33,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-12-18 18:43:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:33,835 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-18 18:43:33,835 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) [2023-12-18 18:43:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-18 18:43:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 18:43:33,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:33,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:33,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:34,042 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 [2023-12-18 18:43:34,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:34,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1872132756, now seen corresponding path program 1 times [2023-12-18 18:43:34,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:34,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76022501] [2023-12-18 18:43:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76022501] [2023-12-18 18:43:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76022501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611474104] [2023-12-18 18:43:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:34,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:34,446 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) [2023-12-18 18:43:34,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:43:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:34,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 18:43:34,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:34,550 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 [2023-12-18 18:43:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:34,600 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 [2023-12-18 18:43:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:34,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:34,762 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 [2023-12-18 18:43:34,767 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 [2023-12-18 18:43:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611474104] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:34,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-12-18 18:43:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366391522] [2023-12-18 18:43:34,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 18:43:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 18:43:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-12-18 18:43:34,788 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) [2023-12-18 18:43:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:34,929 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-12-18 18:43:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 18:43:34,930 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 [2023-12-18 18:43:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:34,930 INFO L225 Difference]: With dead ends: 24 [2023-12-18 18:43:34,930 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 18:43:34,931 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 [2023-12-18 18:43:34,932 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 [2023-12-18 18:43:34,934 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] [2023-12-18 18:43:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 18:43:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2023-12-18 18:43:34,941 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) [2023-12-18 18:43:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-18 18:43:34,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2023-12-18 18:43:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:34,942 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-18 18:43:34,942 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) [2023-12-18 18:43:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-18 18:43:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 18:43:34,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:34,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:34,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:35,147 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 [2023-12-18 18:43:35,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:35,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1743708518, now seen corresponding path program 1 times [2023-12-18 18:43:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268537168] [2023-12-18 18:43:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:35,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268537168] [2023-12-18 18:43:35,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268537168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:35,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112344886] [2023-12-18 18:43:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:35,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:35,301 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) [2023-12-18 18:43:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:43:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:35,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-18 18:43:35,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:35,372 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 [2023-12-18 18:43:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:35,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:35,500 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 [2023-12-18 18:43:35,502 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 [2023-12-18 18:43:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112344886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:35,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:35,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-12-18 18:43:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284914325] [2023-12-18 18:43:35,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:35,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 18:43:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 18:43:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-12-18 18:43:35,512 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) [2023-12-18 18:43:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:35,638 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-12-18 18:43:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 18:43:35,641 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 [2023-12-18 18:43:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:35,642 INFO L225 Difference]: With dead ends: 46 [2023-12-18 18:43:35,642 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 18:43:35,643 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 [2023-12-18 18:43:35,643 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 [2023-12-18 18:43:35,644 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] [2023-12-18 18:43:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 18:43:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2023-12-18 18:43:35,652 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) [2023-12-18 18:43:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-12-18 18:43:35,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2023-12-18 18:43:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:35,653 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-12-18 18:43:35,654 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) [2023-12-18 18:43:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-12-18 18:43:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 18:43:35,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:35,654 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:35,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:35,858 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 [2023-12-18 18:43:35,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:35,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -803648724, now seen corresponding path program 2 times [2023-12-18 18:43:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291479392] [2023-12-18 18:43:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:35,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:35,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291479392] [2023-12-18 18:43:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291479392] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:35,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82901192] [2023-12-18 18:43:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:43:35,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:35,929 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) [2023-12-18 18:43:35,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:43:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:43:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:35,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 18:43:35,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:36,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82901192] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:36,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-12-18 18:43:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060549844] [2023-12-18 18:43:36,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 18:43:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 18:43:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-12-18 18:43:36,066 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) [2023-12-18 18:43:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:36,127 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-12-18 18:43:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 18:43:36,127 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 [2023-12-18 18:43:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:36,128 INFO L225 Difference]: With dead ends: 67 [2023-12-18 18:43:36,128 INFO L226 Difference]: Without dead ends: 37 [2023-12-18 18:43:36,128 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 [2023-12-18 18:43:36,128 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 [2023-12-18 18:43:36,129 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] [2023-12-18 18:43:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-18 18:43:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-12-18 18:43:36,132 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) [2023-12-18 18:43:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-18 18:43:36,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2023-12-18 18:43:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:36,133 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-18 18:43:36,133 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) [2023-12-18 18:43:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-18 18:43:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 18:43:36,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:36,133 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:36,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:36,338 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 [2023-12-18 18:43:36,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:36,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -217740570, now seen corresponding path program 3 times [2023-12-18 18:43:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128360348] [2023-12-18 18:43:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:36,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:36,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128360348] [2023-12-18 18:43:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128360348] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083378012] [2023-12-18 18:43:36,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:43:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:36,698 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) [2023-12-18 18:43:36,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:43:36,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 18:43:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:36,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 18:43:36,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:36,787 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 [2023-12-18 18:43:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:36,811 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 [2023-12-18 18:43:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:36,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 18:43:36,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:36,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:36,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:36,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:36,877 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 [2023-12-18 18:43:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:37,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:37,144 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 [2023-12-18 18:43:37,147 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 [2023-12-18 18:43:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:43:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083378012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:37,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:37,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-12-18 18:43:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137639914] [2023-12-18 18:43:37,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 18:43:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 18:43:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-12-18 18:43:37,201 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) [2023-12-18 18:43:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:37,566 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2023-12-18 18:43:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 18:43:37,566 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 [2023-12-18 18:43:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:37,566 INFO L225 Difference]: With dead ends: 57 [2023-12-18 18:43:37,566 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 18:43:37,567 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 [2023-12-18 18:43:37,567 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 [2023-12-18 18:43:37,568 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] [2023-12-18 18:43:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 18:43:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 23. [2023-12-18 18:43:37,571 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) [2023-12-18 18:43:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-18 18:43:37,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2023-12-18 18:43:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:37,572 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-18 18:43:37,572 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) [2023-12-18 18:43:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-18 18:43:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 18:43:37,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:37,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:37,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:37,777 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 [2023-12-18 18:43:37,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1443181976, now seen corresponding path program 4 times [2023-12-18 18:43:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:37,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926678650] [2023-12-18 18:43:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:37,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926678650] [2023-12-18 18:43:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926678650] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508147071] [2023-12-18 18:43:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:43:37,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:37,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:37,934 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) [2023-12-18 18:43:37,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:43:37,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:43:37,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:37,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 18:43:37,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:38,034 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 [2023-12-18 18:43:38,184 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:43:38,185 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 [2023-12-18 18:43:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:38,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:38,333 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 [2023-12-18 18:43:38,335 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 [2023-12-18 18:43:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:38,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508147071] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:38,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2023-12-18 18:43:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074091382] [2023-12-18 18:43:38,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 18:43:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 18:43:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-12-18 18:43:38,389 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) [2023-12-18 18:43:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:38,850 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-12-18 18:43:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 18:43:38,850 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 [2023-12-18 18:43:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:38,851 INFO L225 Difference]: With dead ends: 67 [2023-12-18 18:43:38,851 INFO L226 Difference]: Without dead ends: 52 [2023-12-18 18:43:38,851 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 [2023-12-18 18:43:38,852 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 [2023-12-18 18:43:38,852 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] [2023-12-18 18:43:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-18 18:43:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2023-12-18 18:43:38,857 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) [2023-12-18 18:43:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-18 18:43:38,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 22 [2023-12-18 18:43:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:38,857 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-18 18:43:38,857 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) [2023-12-18 18:43:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-18 18:43:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 18:43:38,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:38,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:38,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:39,062 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 [2023-12-18 18:43:39,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:39,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2093765608, now seen corresponding path program 5 times [2023-12-18 18:43:39,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:39,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160746844] [2023-12-18 18:43:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:39,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160746844] [2023-12-18 18:43:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160746844] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437498958] [2023-12-18 18:43:39,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:43:39,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:39,336 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) [2023-12-18 18:43:39,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:43:39,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 18:43:39,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:39,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 18:43:39,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:39,454 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 [2023-12-18 18:43:39,478 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 [2023-12-18 18:43:39,486 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 [2023-12-18 18:43:39,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:39,518 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 [2023-12-18 18:43:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:39,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:39,799 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 [2023-12-18 18:43:39,803 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 [2023-12-18 18:43:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437498958] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:39,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2023-12-18 18:43:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736985035] [2023-12-18 18:43:39,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:39,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 18:43:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 18:43:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:43:39,891 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) [2023-12-18 18:43:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:40,471 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2023-12-18 18:43:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-18 18:43:40,471 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 [2023-12-18 18:43:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:40,471 INFO L225 Difference]: With dead ends: 77 [2023-12-18 18:43:40,471 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 18:43:40,472 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 [2023-12-18 18:43:40,472 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 [2023-12-18 18:43:40,473 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] [2023-12-18 18:43:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 18:43:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2023-12-18 18:43:40,479 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) [2023-12-18 18:43:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-18 18:43:40,480 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2023-12-18 18:43:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:40,480 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-18 18:43:40,480 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) [2023-12-18 18:43:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-18 18:43:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 18:43:40,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:40,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:40,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:40,685 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 [2023-12-18 18:43:40,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:40,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:40,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2104111834, now seen corresponding path program 6 times [2023-12-18 18:43:40,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:40,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851665885] [2023-12-18 18:43:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:40,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851665885] [2023-12-18 18:43:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851665885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121232986] [2023-12-18 18:43:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:43:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:40,882 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) [2023-12-18 18:43:40,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:43:40,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 18:43:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:40,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 18:43:40,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:40,975 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 [2023-12-18 18:43:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:41,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:41,167 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 [2023-12-18 18:43:41,172 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 [2023-12-18 18:43:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121232986] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:41,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-12-18 18:43:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603376836] [2023-12-18 18:43:41,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 18:43:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 18:43:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-12-18 18:43:41,226 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) [2023-12-18 18:43:41,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:41,493 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2023-12-18 18:43:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 18:43:41,493 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 [2023-12-18 18:43:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:41,494 INFO L225 Difference]: With dead ends: 100 [2023-12-18 18:43:41,494 INFO L226 Difference]: Without dead ends: 98 [2023-12-18 18:43:41,494 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 [2023-12-18 18:43:41,495 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 [2023-12-18 18:43:41,495 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] [2023-12-18 18:43:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-18 18:43:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 50. [2023-12-18 18:43:41,503 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) [2023-12-18 18:43:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-18 18:43:41,503 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 28 [2023-12-18 18:43:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:41,503 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-18 18:43:41,504 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) [2023-12-18 18:43:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-18 18:43:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 18:43:41,504 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:41,504 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:41,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:41,712 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 [2023-12-18 18:43:41,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:41,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1457375084, now seen corresponding path program 7 times [2023-12-18 18:43:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823373425] [2023-12-18 18:43:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:41,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:41,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823373425] [2023-12-18 18:43:41,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823373425] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:41,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989666316] [2023-12-18 18:43:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:43:41,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:41,808 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) [2023-12-18 18:43:41,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:43:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:41,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 18:43:41,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:41,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989666316] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:42,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-12-18 18:43:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214087757] [2023-12-18 18:43:42,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:42,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 18:43:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 18:43:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-18 18:43:42,034 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) [2023-12-18 18:43:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:42,117 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2023-12-18 18:43:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 18:43:42,118 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 [2023-12-18 18:43:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:42,118 INFO L225 Difference]: With dead ends: 82 [2023-12-18 18:43:42,118 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 18:43:42,118 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 [2023-12-18 18:43:42,119 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:42,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:43:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 18:43:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2023-12-18 18:43:42,125 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) [2023-12-18 18:43:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-18 18:43:42,125 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2023-12-18 18:43:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:42,125 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-18 18:43:42,126 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) [2023-12-18 18:43:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-18 18:43:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:43:42,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:42,126 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:42,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-18 18:43:42,330 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 [2023-12-18 18:43:42,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:42,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash 549115882, now seen corresponding path program 8 times [2023-12-18 18:43:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:42,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944056358] [2023-12-18 18:43:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:42,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944056358] [2023-12-18 18:43:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944056358] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689229462] [2023-12-18 18:43:42,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:43:42,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:42,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:42,804 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) [2023-12-18 18:43:42,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:43:42,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:43:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:42,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 18:43:42,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:42,900 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 [2023-12-18 18:43:42,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:42,922 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 [2023-12-18 18:43:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:42,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 18:43:42,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:42,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:42,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:42,974 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 [2023-12-18 18:43:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:43,006 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 [2023-12-18 18:43:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:43,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:43,080 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 [2023-12-18 18:43:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:43,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:43,750 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 [2023-12-18 18:43:43,756 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 [2023-12-18 18:43:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:43:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689229462] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:43,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 38 [2023-12-18 18:43:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644618761] [2023-12-18 18:43:43,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 18:43:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 18:43:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 18:43:43,904 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) [2023-12-18 18:43:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:44,546 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-12-18 18:43:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 18:43:44,547 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 [2023-12-18 18:43:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:44,547 INFO L225 Difference]: With dead ends: 73 [2023-12-18 18:43:44,547 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 18:43:44,548 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 [2023-12-18 18:43:44,548 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 [2023-12-18 18:43:44,549 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] [2023-12-18 18:43:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 18:43:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2023-12-18 18:43:44,556 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) [2023-12-18 18:43:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-18 18:43:44,556 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2023-12-18 18:43:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:44,556 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-18 18:43:44,556 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) [2023-12-18 18:43:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-18 18:43:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:43:44,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:44,557 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:44,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:44,762 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 [2023-12-18 18:43:44,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -29622102, now seen corresponding path program 9 times [2023-12-18 18:43:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339237650] [2023-12-18 18:43:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:44,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:44,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339237650] [2023-12-18 18:43:44,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339237650] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:44,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86845341] [2023-12-18 18:43:44,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:43:44,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:44,909 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) [2023-12-18 18:43:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:43:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 18:43:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:45,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 18:43:45,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:45,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:45,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86845341] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:45,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:45,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-12-18 18:43:45,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629759910] [2023-12-18 18:43:45,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:45,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 18:43:45,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:45,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 18:43:45,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-12-18 18:43:45,246 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) [2023-12-18 18:43:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:45,360 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2023-12-18 18:43:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 18:43:45,360 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 [2023-12-18 18:43:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:45,361 INFO L225 Difference]: With dead ends: 88 [2023-12-18 18:43:45,361 INFO L226 Difference]: Without dead ends: 64 [2023-12-18 18:43:45,362 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 [2023-12-18 18:43:45,363 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-12-18 18:43:45,363 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] [2023-12-18 18:43:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-18 18:43:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2023-12-18 18:43:45,376 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) [2023-12-18 18:43:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-18 18:43:45,376 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2023-12-18 18:43:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:45,376 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-18 18:43:45,376 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) [2023-12-18 18:43:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-18 18:43:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:43:45,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:45,379 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:45,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:45,585 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 [2023-12-18 18:43:45,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:45,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -813853144, now seen corresponding path program 10 times [2023-12-18 18:43:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249662779] [2023-12-18 18:43:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:45,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:45,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249662779] [2023-12-18 18:43:45,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249662779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:45,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489897532] [2023-12-18 18:43:45,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:43:45,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:45,962 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) [2023-12-18 18:43:45,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:43:46,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:43:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:46,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 18:43:46,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:46,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 18:43:46,148 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 [2023-12-18 18:43:46,152 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 [2023-12-18 18:43:46,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:46,223 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 [2023-12-18 18:43:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:46,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:46,747 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 [2023-12-18 18:43:46,749 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 [2023-12-18 18:43:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:43:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489897532] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:46,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 41 [2023-12-18 18:43:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142037538] [2023-12-18 18:43:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 18:43:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 18:43:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:43:46,900 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) [2023-12-18 18:43:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:47,727 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2023-12-18 18:43:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-18 18:43:47,727 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 [2023-12-18 18:43:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:47,728 INFO L225 Difference]: With dead ends: 95 [2023-12-18 18:43:47,728 INFO L226 Difference]: Without dead ends: 66 [2023-12-18 18:43:47,729 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 [2023-12-18 18:43:47,729 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 [2023-12-18 18:43:47,730 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] [2023-12-18 18:43:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-18 18:43:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2023-12-18 18:43:47,737 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) [2023-12-18 18:43:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-18 18:43:47,738 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2023-12-18 18:43:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:47,738 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-18 18:43:47,738 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) [2023-12-18 18:43:47,738 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-18 18:43:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:43:47,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:47,738 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:47,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:47,944 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 [2023-12-18 18:43:47,944 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:47,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1011525862, now seen corresponding path program 11 times [2023-12-18 18:43:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166007413] [2023-12-18 18:43:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:48,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:48,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166007413] [2023-12-18 18:43:48,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166007413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:48,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186377634] [2023-12-18 18:43:48,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:43:48,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:48,252 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) [2023-12-18 18:43:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:43:48,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 18:43:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:48,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 18:43:48,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:48,463 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 [2023-12-18 18:43:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:48,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:48,809 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 [2023-12-18 18:43:48,811 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 [2023-12-18 18:43:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:48,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186377634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:48,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:48,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 33 [2023-12-18 18:43:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627532357] [2023-12-18 18:43:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 18:43:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 18:43:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 18:43:48,831 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) [2023-12-18 18:43:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:49,279 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-12-18 18:43:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 18:43:49,280 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 [2023-12-18 18:43:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:49,280 INFO L225 Difference]: With dead ends: 81 [2023-12-18 18:43:49,280 INFO L226 Difference]: Without dead ends: 79 [2023-12-18 18:43:49,281 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 [2023-12-18 18:43:49,281 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 [2023-12-18 18:43:49,281 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] [2023-12-18 18:43:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-18 18:43:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 53. [2023-12-18 18:43:49,292 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) [2023-12-18 18:43:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-12-18 18:43:49,292 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2023-12-18 18:43:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:49,293 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-12-18 18:43:49,293 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) [2023-12-18 18:43:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-12-18 18:43:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 18:43:49,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:49,293 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:49,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 18:43:49,495 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 [2023-12-18 18:43:49,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:49,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 881742764, now seen corresponding path program 12 times [2023-12-18 18:43:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:49,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410489889] [2023-12-18 18:43:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:49,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410489889] [2023-12-18 18:43:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410489889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124015807] [2023-12-18 18:43:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:43:49,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:49,664 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) [2023-12-18 18:43:49,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:43:49,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 18:43:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:49,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 18:43:49,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:49,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124015807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:50,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2023-12-18 18:43:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894868013] [2023-12-18 18:43:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 18:43:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 18:43:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-12-18 18:43:50,056 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) [2023-12-18 18:43:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:50,169 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2023-12-18 18:43:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 18:43:50,170 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 [2023-12-18 18:43:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:50,170 INFO L225 Difference]: With dead ends: 80 [2023-12-18 18:43:50,170 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 18:43:50,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2023-12-18 18:43:50,171 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 [2023-12-18 18:43:50,171 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] [2023-12-18 18:43:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 18:43:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-12-18 18:43:50,179 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) [2023-12-18 18:43:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-18 18:43:50,179 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2023-12-18 18:43:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:50,179 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-18 18:43:50,179 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) [2023-12-18 18:43:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-18 18:43:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 18:43:50,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:50,180 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:50,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:50,385 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 [2023-12-18 18:43:50,385 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:50,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1616695910, now seen corresponding path program 13 times [2023-12-18 18:43:50,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922520713] [2023-12-18 18:43:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:50,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922520713] [2023-12-18 18:43:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922520713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820511503] [2023-12-18 18:43:50,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:43:50,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:50,748 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) [2023-12-18 18:43:50,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 18:43:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:50,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 18:43:50,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:50,950 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 [2023-12-18 18:43:50,976 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 [2023-12-18 18:43:50,988 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 [2023-12-18 18:43:51,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:51,032 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 [2023-12-18 18:43:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:51,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:51,546 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 [2023-12-18 18:43:51,556 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 [2023-12-18 18:43:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 5 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820511503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:51,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:51,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2023-12-18 18:43:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299213250] [2023-12-18 18:43:51,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:51,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 18:43:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 18:43:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 18:43:51,734 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) [2023-12-18 18:43:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:52,415 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-12-18 18:43:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 18:43:52,415 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 [2023-12-18 18:43:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:52,416 INFO L225 Difference]: With dead ends: 92 [2023-12-18 18:43:52,416 INFO L226 Difference]: Without dead ends: 90 [2023-12-18 18:43:52,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2023-12-18 18:43:52,418 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:52,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 163 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:43:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-18 18:43:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2023-12-18 18:43:52,437 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) [2023-12-18 18:43:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-12-18 18:43:52,438 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 46 [2023-12-18 18:43:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:52,438 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-12-18 18:43:52,438 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) [2023-12-18 18:43:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-12-18 18:43:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 18:43:52,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:52,439 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:52,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-18 18:43:52,644 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 [2023-12-18 18:43:52,644 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:52,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 169754796, now seen corresponding path program 14 times [2023-12-18 18:43:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916404735] [2023-12-18 18:43:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 4 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:53,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:53,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916404735] [2023-12-18 18:43:53,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916404735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:53,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341592106] [2023-12-18 18:43:53,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:43:53,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:53,261 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) [2023-12-18 18:43:53,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 18:43:53,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:43:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:53,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 18:43:53,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:53,517 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 [2023-12-18 18:43:53,542 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 [2023-12-18 18:43:53,546 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 [2023-12-18 18:43:53,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:53,594 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 [2023-12-18 18:43:53,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:53,602 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 [2023-12-18 18:43:53,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:53,638 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 [2023-12-18 18:43:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:54,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:54,217 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 [2023-12-18 18:43:54,221 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 [2023-12-18 18:43:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:54,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341592106] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:54,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:54,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 50 [2023-12-18 18:43:54,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566603410] [2023-12-18 18:43:54,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:54,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 18:43:54,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 18:43:54,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 18:43:54,443 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) [2023-12-18 18:43:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:55,850 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2023-12-18 18:43:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-18 18:43:55,851 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 [2023-12-18 18:43:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:55,851 INFO L225 Difference]: With dead ends: 141 [2023-12-18 18:43:55,851 INFO L226 Difference]: Without dead ends: 139 [2023-12-18 18:43:55,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=959, Invalid=7783, Unknown=0, NotChecked=0, Total=8742 [2023-12-18 18:43:55,854 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 [2023-12-18 18:43:55,854 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] [2023-12-18 18:43:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-18 18:43:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 80. [2023-12-18 18:43:55,871 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) [2023-12-18 18:43:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-12-18 18:43:55,872 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 55 [2023-12-18 18:43:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:55,872 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-12-18 18:43:55,872 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) [2023-12-18 18:43:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-12-18 18:43:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 18:43:55,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:55,872 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:55,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:56,076 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 [2023-12-18 18:43:56,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:56,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2122248172, now seen corresponding path program 15 times [2023-12-18 18:43:56,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:56,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929925046] [2023-12-18 18:43:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:56,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929925046] [2023-12-18 18:43:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929925046] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025188865] [2023-12-18 18:43:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:43:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:56,339 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) [2023-12-18 18:43:56,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 18:43:56,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 18:43:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:56,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-18 18:43:56,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:56,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025188865] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:56,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:56,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2023-12-18 18:43:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971918329] [2023-12-18 18:43:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:43:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:43:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:43:56,935 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) [2023-12-18 18:43:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:57,125 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2023-12-18 18:43:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 18:43:57,127 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 [2023-12-18 18:43:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:57,128 INFO L225 Difference]: With dead ends: 162 [2023-12-18 18:43:57,128 INFO L226 Difference]: Without dead ends: 129 [2023-12-18 18:43:57,128 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 [2023-12-18 18:43:57,129 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 [2023-12-18 18:43:57,129 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] [2023-12-18 18:43:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-18 18:43:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 80. [2023-12-18 18:43:57,147 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) [2023-12-18 18:43:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-12-18 18:43:57,148 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 55 [2023-12-18 18:43:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:57,148 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-12-18 18:43:57,148 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) [2023-12-18 18:43:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-12-18 18:43:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-18 18:43:57,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:57,149 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:57,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:57,351 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 [2023-12-18 18:43:57,351 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:57,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1725791960, now seen corresponding path program 16 times [2023-12-18 18:43:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209297741] [2023-12-18 18:43:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:57,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209297741] [2023-12-18 18:43:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209297741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307869380] [2023-12-18 18:43:57,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:43:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:57,785 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) [2023-12-18 18:43:57,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 18:43:58,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:43:58,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:58,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 18:43:58,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:58,328 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 15 treesize of output 11 [2023-12-18 18:43:58,883 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:43:58,883 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 [2023-12-18 18:43:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 92 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:58,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:59,530 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 [2023-12-18 18:43:59,532 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 [2023-12-18 18:43:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 84 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307869380] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:59,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:59,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 54 [2023-12-18 18:43:59,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76855680] [2023-12-18 18:43:59,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 18:43:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 18:43:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2525, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 18:43:59,713 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) [2023-12-18 18:44:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:01,640 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2023-12-18 18:44:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-18 18:44:01,640 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 [2023-12-18 18:44:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:01,641 INFO L225 Difference]: With dead ends: 178 [2023-12-18 18:44:01,641 INFO L226 Difference]: Without dead ends: 145 [2023-12-18 18:44:01,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1177, Invalid=9535, Unknown=0, NotChecked=0, Total=10712 [2023-12-18 18:44:01,644 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2023-12-18 18:44:01,644 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] [2023-12-18 18:44:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-18 18:44:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 77. [2023-12-18 18:44:01,661 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) [2023-12-18 18:44:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-12-18 18:44:01,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 58 [2023-12-18 18:44:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:01,662 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-12-18 18:44:01,662 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) [2023-12-18 18:44:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-12-18 18:44:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-18 18:44:01,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:01,663 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:01,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-18 18:44:01,868 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 [2023-12-18 18:44:01,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1723586650, now seen corresponding path program 17 times [2023-12-18 18:44:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:01,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832780596] [2023-12-18 18:44:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 10 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:02,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832780596] [2023-12-18 18:44:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832780596] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104963137] [2023-12-18 18:44:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:44:02,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:02,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:02,520 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) [2023-12-18 18:44:02,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 18:44:02,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-18 18:44:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:02,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-18 18:44:02,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:03,106 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 [2023-12-18 18:44:03,132 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 [2023-12-18 18:44:03,139 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 [2023-12-18 18:44:03,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:03,175 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 [2023-12-18 18:44:03,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:03,184 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 [2023-12-18 18:44:03,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:03,232 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 [2023-12-18 18:44:03,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:03,243 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 [2023-12-18 18:44:03,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:03,308 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 [2023-12-18 18:44:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:03,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:04,194 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 [2023-12-18 18:44:04,197 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 [2023-12-18 18:44:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104963137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 60 [2023-12-18 18:44:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485879078] [2023-12-18 18:44:04,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-18 18:44:04,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-18 18:44:04,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=3110, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 18:44:04,540 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) [2023-12-18 18:44:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:06,516 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2023-12-18 18:44:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-18 18:44:06,516 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 [2023-12-18 18:44:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:06,516 INFO L225 Difference]: With dead ends: 167 [2023-12-18 18:44:06,517 INFO L226 Difference]: Without dead ends: 165 [2023-12-18 18:44:06,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 82 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1361, Invalid=11979, Unknown=0, NotChecked=0, Total=13340 [2023-12-18 18:44:06,518 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 231 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:44:06,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 481 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:44:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-18 18:44:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 92. [2023-12-18 18:44:06,542 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) [2023-12-18 18:44:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2023-12-18 18:44:06,542 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 64 [2023-12-18 18:44:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:06,542 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2023-12-18 18:44:06,543 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) [2023-12-18 18:44:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2023-12-18 18:44:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 18:44:06,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:06,543 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:06,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:06,749 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 [2023-12-18 18:44:06,750 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:06,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash 184785964, now seen corresponding path program 18 times [2023-12-18 18:44:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:06,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042014938] [2023-12-18 18:44:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042014938] [2023-12-18 18:44:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042014938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776146565] [2023-12-18 18:44:07,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:44:07,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:07,054 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) [2023-12-18 18:44:07,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 18:44:07,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-18 18:44:07,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:07,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-18 18:44:07,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:07,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776146565] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:08,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:08,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2023-12-18 18:44:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472214810] [2023-12-18 18:44:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-18 18:44:08,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-18 18:44:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 18:44:08,104 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) [2023-12-18 18:44:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:08,344 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2023-12-18 18:44:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 18:44:08,344 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 [2023-12-18 18:44:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:08,345 INFO L225 Difference]: With dead ends: 194 [2023-12-18 18:44:08,345 INFO L226 Difference]: Without dead ends: 155 [2023-12-18 18:44:08,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 18:44:08,346 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 [2023-12-18 18:44:08,346 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] [2023-12-18 18:44:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-18 18:44:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 92. [2023-12-18 18:44:08,369 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) [2023-12-18 18:44:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-18 18:44:08,370 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 67 [2023-12-18 18:44:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:08,370 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-18 18:44:08,370 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) [2023-12-18 18:44:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-18 18:44:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-18 18:44:08,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:08,370 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:08,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:08,576 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 [2023-12-18 18:44:08,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1720398696, now seen corresponding path program 19 times [2023-12-18 18:44:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191631006] [2023-12-18 18:44:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191631006] [2023-12-18 18:44:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191631006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12586201] [2023-12-18 18:44:09,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:44:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:09,117 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) [2023-12-18 18:44:09,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 18:44:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:09,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 18:44:09,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:09,528 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 [2023-12-18 18:44:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:10,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:10,261 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 [2023-12-18 18:44:10,263 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 [2023-12-18 18:44:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:10,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12586201] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:10,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:10,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-12-18 18:44:10,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971169822] [2023-12-18 18:44:10,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:10,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-18 18:44:10,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:10,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-18 18:44:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 18:44:10,287 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) [2023-12-18 18:44:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:11,305 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2023-12-18 18:44:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-18 18:44:11,306 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 [2023-12-18 18:44:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:11,306 INFO L225 Difference]: With dead ends: 209 [2023-12-18 18:44:11,306 INFO L226 Difference]: Without dead ends: 207 [2023-12-18 18:44:11,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=5059, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 18:44:11,307 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 [2023-12-18 18:44:11,307 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] [2023-12-18 18:44:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-18 18:44:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 92. [2023-12-18 18:44:11,332 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) [2023-12-18 18:44:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-18 18:44:11,333 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 70 [2023-12-18 18:44:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:11,333 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-18 18:44:11,333 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) [2023-12-18 18:44:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-18 18:44:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-18 18:44:11,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:11,333 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:11,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:11,538 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 [2023-12-18 18:44:11,539 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:11,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2047655060, now seen corresponding path program 20 times [2023-12-18 18:44:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213603481] [2023-12-18 18:44:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 19 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213603481] [2023-12-18 18:44:12,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213603481] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789375161] [2023-12-18 18:44:12,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:44:12,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:12,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:12,458 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) [2023-12-18 18:44:12,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 18:44:12,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:44:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:12,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-18 18:44:12,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:12,644 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 [2023-12-18 18:44:12,677 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 [2023-12-18 18:44:12,684 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 [2023-12-18 18:44:12,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,725 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 [2023-12-18 18:44:12,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,734 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 [2023-12-18 18:44:12,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,782 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 [2023-12-18 18:44:12,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,793 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 [2023-12-18 18:44:12,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,848 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 [2023-12-18 18:44:12,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,861 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 [2023-12-18 18:44:12,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,923 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 [2023-12-18 18:44:12,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:12,937 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 [2023-12-18 18:44:13,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:13,029 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 [2023-12-18 18:44:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:13,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:14,187 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 [2023-12-18 18:44:14,562 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 [2023-12-18 18:44:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 51 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789375161] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:16,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:16,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 70 [2023-12-18 18:44:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336885681] [2023-12-18 18:44:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:16,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-12-18 18:44:16,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-12-18 18:44:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=4184, Unknown=0, NotChecked=0, Total=4830 [2023-12-18 18:44:16,366 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) [2023-12-18 18:44:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:19,149 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2023-12-18 18:44:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-18 18:44:19,149 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 [2023-12-18 18:44:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:19,152 INFO L225 Difference]: With dead ends: 228 [2023-12-18 18:44:19,152 INFO L226 Difference]: Without dead ends: 226 [2023-12-18 18:44:19,153 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 [2023-12-18 18:44:19,154 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 342 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:44:19,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 642 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-18 18:44:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-18 18:44:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 107. [2023-12-18 18:44:19,187 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) [2023-12-18 18:44:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2023-12-18 18:44:19,188 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 73 [2023-12-18 18:44:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:19,188 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2023-12-18 18:44:19,188 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) [2023-12-18 18:44:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2023-12-18 18:44:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-18 18:44:19,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:19,189 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:19,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:19,394 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 [2023-12-18 18:44:19,394 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:19,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 558146026, now seen corresponding path program 21 times [2023-12-18 18:44:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:19,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223090591] [2023-12-18 18:44:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223090591] [2023-12-18 18:44:19,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223090591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205199506] [2023-12-18 18:44:19,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:44:19,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:19,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:19,741 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) [2023-12-18 18:44:19,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 18:44:20,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-18 18:44:20,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:20,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 18:44:20,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:20,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205199506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:20,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2023-12-18 18:44:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684059471] [2023-12-18 18:44:20,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:20,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-18 18:44:20,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:20,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-18 18:44:20,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 18:44:20,582 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) [2023-12-18 18:44:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:20,899 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2023-12-18 18:44:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 18:44:20,900 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 [2023-12-18 18:44:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:20,900 INFO L225 Difference]: With dead ends: 216 [2023-12-18 18:44:20,900 INFO L226 Difference]: Without dead ends: 174 [2023-12-18 18:44:20,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 110 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2023-12-18 18:44:20,901 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 [2023-12-18 18:44:20,901 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] [2023-12-18 18:44:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-18 18:44:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 104. [2023-12-18 18:44:20,934 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) [2023-12-18 18:44:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2023-12-18 18:44:20,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 73 [2023-12-18 18:44:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2023-12-18 18:44:20,935 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) [2023-12-18 18:44:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2023-12-18 18:44:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:44:20,935 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:20,935 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:20,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-18 18:44:21,136 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 [2023-12-18 18:44:21,136 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:21,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1318037396, now seen corresponding path program 22 times [2023-12-18 18:44:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675864959] [2023-12-18 18:44:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675864959] [2023-12-18 18:44:21,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675864959] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475499495] [2023-12-18 18:44:21,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:44:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:21,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:21,497 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) [2023-12-18 18:44:21,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 18:44:22,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:44:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:22,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 18:44:22,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:22,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475499495] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:22,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:22,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2023-12-18 18:44:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408758755] [2023-12-18 18:44:22,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 18:44:22,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 18:44:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 18:44:22,535 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) [2023-12-18 18:44:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:22,770 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2023-12-18 18:44:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 18:44:22,803 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 [2023-12-18 18:44:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:22,803 INFO L225 Difference]: With dead ends: 226 [2023-12-18 18:44:22,804 INFO L226 Difference]: Without dead ends: 181 [2023-12-18 18:44:22,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 119 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 18:44:22,804 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 [2023-12-18 18:44:22,805 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] [2023-12-18 18:44:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-18 18:44:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 104. [2023-12-18 18:44:22,841 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) [2023-12-18 18:44:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2023-12-18 18:44:22,841 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 79 [2023-12-18 18:44:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:22,841 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2023-12-18 18:44:22,842 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) [2023-12-18 18:44:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2023-12-18 18:44:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 18:44:22,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:22,842 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:22,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-18 18:44:23,049 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 [2023-12-18 18:44:23,050 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:23,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1476408090, now seen corresponding path program 23 times [2023-12-18 18:44:23,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:23,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294517300] [2023-12-18 18:44:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 31 proven. 471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:23,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:23,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294517300] [2023-12-18 18:44:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294517300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:23,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117325681] [2023-12-18 18:44:23,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:44:23,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:23,984 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) [2023-12-18 18:44:23,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 18:44:24,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-18 18:44:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:24,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-18 18:44:24,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:25,158 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 [2023-12-18 18:44:25,192 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 [2023-12-18 18:44:25,199 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 [2023-12-18 18:44:25,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,241 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 [2023-12-18 18:44:25,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,253 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 [2023-12-18 18:44:25,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,303 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 [2023-12-18 18:44:25,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,319 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 [2023-12-18 18:44:25,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,366 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 [2023-12-18 18:44:25,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,377 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 [2023-12-18 18:44:25,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,428 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 [2023-12-18 18:44:25,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,447 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 [2023-12-18 18:44:25,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:25,512 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 [2023-12-18 18:44:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:26,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:26,968 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 76 treesize of output 74 [2023-12-18 18:44:27,030 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 [2023-12-18 18:44:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 51 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117325681] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:27,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:27,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 76 [2023-12-18 18:44:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684808384] [2023-12-18 18:44:27,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:27,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-18 18:44:27,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-18 18:44:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=5021, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 18:44:27,779 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) [2023-12-18 18:44:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:30,636 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2023-12-18 18:44:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-18 18:44:30,636 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 [2023-12-18 18:44:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:30,637 INFO L225 Difference]: With dead ends: 257 [2023-12-18 18:44:30,637 INFO L226 Difference]: Without dead ends: 255 [2023-12-18 18:44:30,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 106 SyntacticMatches, 17 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7013 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2169, Invalid=20181, Unknown=0, NotChecked=0, Total=22350 [2023-12-18 18:44:30,639 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 [2023-12-18 18:44:30,640 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] [2023-12-18 18:44:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-18 18:44:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 119. [2023-12-18 18:44:30,684 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) [2023-12-18 18:44:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2023-12-18 18:44:30,685 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 82 [2023-12-18 18:44:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:30,685 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2023-12-18 18:44:30,685 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) [2023-12-18 18:44:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2023-12-18 18:44:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 18:44:30,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:30,685 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:30,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:30,892 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 [2023-12-18 18:44:30,892 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 704837032, now seen corresponding path program 24 times [2023-12-18 18:44:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708029958] [2023-12-18 18:44:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:31,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708029958] [2023-12-18 18:44:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708029958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944907079] [2023-12-18 18:44:31,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:44:31,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:31,631 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) [2023-12-18 18:44:31,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 18:44:32,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-12-18 18:44:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:32,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 18:44:32,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:32,421 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 15 treesize of output 11 [2023-12-18 18:44:33,260 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:44:33,260 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 [2023-12-18 18:44:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 202 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:33,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:34,281 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 [2023-12-18 18:44:34,283 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 [2023-12-18 18:44:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 195 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:34,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944907079] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:34,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:34,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2023-12-18 18:44:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627818800] [2023-12-18 18:44:34,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-18 18:44:34,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-18 18:44:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=4956, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 18:44:34,581 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) [2023-12-18 18:44:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:37,618 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2023-12-18 18:44:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-12-18 18:44:37,619 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 [2023-12-18 18:44:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:37,619 INFO L225 Difference]: With dead ends: 294 [2023-12-18 18:44:37,619 INFO L226 Difference]: Without dead ends: 249 [2023-12-18 18:44:37,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6183 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2698, Invalid=18764, Unknown=0, NotChecked=0, Total=21462 [2023-12-18 18:44:37,621 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:44:37,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 249 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:44:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-18 18:44:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 116. [2023-12-18 18:44:37,665 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) [2023-12-18 18:44:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2023-12-18 18:44:37,665 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 82 [2023-12-18 18:44:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:37,666 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2023-12-18 18:44:37,666 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) [2023-12-18 18:44:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2023-12-18 18:44:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-18 18:44:37,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:37,666 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:37,872 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 [2023-12-18 18:44:37,872 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:37,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1941567020, now seen corresponding path program 25 times [2023-12-18 18:44:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126276854] [2023-12-18 18:44:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 46 proven. 586 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:39,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126276854] [2023-12-18 18:44:39,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126276854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:39,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975879968] [2023-12-18 18:44:39,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:44:39,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:39,221 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) [2023-12-18 18:44:39,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 18:44:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:39,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-18 18:44:39,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:39,711 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 [2023-12-18 18:44:39,748 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 [2023-12-18 18:44:39,754 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 [2023-12-18 18:44:39,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,798 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 [2023-12-18 18:44:39,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,807 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 [2023-12-18 18:44:39,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,858 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 [2023-12-18 18:44:39,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,870 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 [2023-12-18 18:44:39,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,929 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 [2023-12-18 18:44:39,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:39,942 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 [2023-12-18 18:44:40,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:40,009 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 [2023-12-18 18:44:40,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:40,022 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 [2023-12-18 18:44:40,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:40,098 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 [2023-12-18 18:44:40,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:40,120 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 [2023-12-18 18:44:40,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:44:40,218 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 [2023-12-18 18:44:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:41,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:42,114 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 [2023-12-18 18:44:42,661 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 [2023-12-18 18:44:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 70 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975879968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:46,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:46,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 84 [2023-12-18 18:44:46,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942289511] [2023-12-18 18:44:46,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:46,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 18:44:46,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 18:44:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=6144, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 18:44:46,391 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) [2023-12-18 18:44:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:50,144 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2023-12-18 18:44:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-18 18:44:50,144 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 [2023-12-18 18:44:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:50,145 INFO L225 Difference]: With dead ends: 292 [2023-12-18 18:44:50,145 INFO L226 Difference]: Without dead ends: 290 [2023-12-18 18:44:50,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 119 SyntacticMatches, 18 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8710 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2645, Invalid=25077, Unknown=0, NotChecked=0, Total=27722 [2023-12-18 18:44:50,154 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 424 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 5080 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:44:50,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1099 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 5080 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-18 18:44:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-18 18:44:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 131. [2023-12-18 18:44:50,230 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) [2023-12-18 18:44:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2023-12-18 18:44:50,231 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 91 [2023-12-18 18:44:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:50,231 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2023-12-18 18:44:50,231 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) [2023-12-18 18:44:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2023-12-18 18:44:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-18 18:44:50,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:50,231 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-18 18:44:50,437 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 [2023-12-18 18:44:50,437 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1978063700, now seen corresponding path program 26 times [2023-12-18 18:44:50,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:50,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616225944] [2023-12-18 18:44:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:50,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616225944] [2023-12-18 18:44:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616225944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898691741] [2023-12-18 18:44:50,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:44:50,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:50,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:50,880 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) [2023-12-18 18:44:50,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-18 18:44:51,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:44:51,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:51,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 18:44:51,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:51,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898691741] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:51,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:51,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2023-12-18 18:44:51,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112001663] [2023-12-18 18:44:51,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 18:44:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 18:44:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 18:44:51,748 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) [2023-12-18 18:44:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:44:52,120 INFO L93 Difference]: Finished difference Result 313 states and 320 transitions. [2023-12-18 18:44:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-18 18:44:52,120 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 [2023-12-18 18:44:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:44:52,121 INFO L225 Difference]: With dead ends: 313 [2023-12-18 18:44:52,121 INFO L226 Difference]: Without dead ends: 262 [2023-12-18 18:44:52,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 137 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2023-12-18 18:44:52,122 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 [2023-12-18 18:44:52,122 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] [2023-12-18 18:44:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-18 18:44:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 131. [2023-12-18 18:44:52,179 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) [2023-12-18 18:44:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2023-12-18 18:44:52,179 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 91 [2023-12-18 18:44:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:44:52,180 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2023-12-18 18:44:52,180 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) [2023-12-18 18:44:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2023-12-18 18:44:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-18 18:44:52,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:44:52,181 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:44:52,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-18 18:44:52,386 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 [2023-12-18 18:44:52,387 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:44:52,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:44:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -111294488, now seen corresponding path program 27 times [2023-12-18 18:44:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:44:52,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016598080] [2023-12-18 18:44:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:44:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:44:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:44:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:53,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:44:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016598080] [2023-12-18 18:44:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016598080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:44:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654639498] [2023-12-18 18:44:53,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:44:53,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:44:53,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:44:53,129 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) [2023-12-18 18:44:53,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-18 18:44:54,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-18 18:44:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:44:54,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-18 18:44:54,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:44:55,035 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 [2023-12-18 18:44:55,997 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:44:55,998 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 [2023-12-18 18:44:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 287 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:56,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:44:57,128 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 [2023-12-18 18:44:57,130 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 [2023-12-18 18:44:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 273 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:44:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654639498] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:44:57,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:44:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 84 [2023-12-18 18:44:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250804243] [2023-12-18 18:44:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:44:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 18:44:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:44:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 18:44:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=6200, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 18:44:57,610 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) [2023-12-18 18:45:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:45:01,299 INFO L93 Difference]: Finished difference Result 332 states and 338 transitions. [2023-12-18 18:45:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-12-18 18:45:01,300 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 [2023-12-18 18:45:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:45:01,300 INFO L225 Difference]: With dead ends: 332 [2023-12-18 18:45:01,300 INFO L226 Difference]: Without dead ends: 281 [2023-12-18 18:45:01,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5532 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2551, Invalid=24181, Unknown=0, NotChecked=0, Total=26732 [2023-12-18 18:45:01,303 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, 1.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:45:01,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 924 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-18 18:45:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-12-18 18:45:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 128. [2023-12-18 18:45:01,362 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) [2023-12-18 18:45:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2023-12-18 18:45:01,362 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 94 [2023-12-18 18:45:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:45:01,362 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2023-12-18 18:45:01,363 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) [2023-12-18 18:45:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2023-12-18 18:45:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-18 18:45:01,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:45:01,363 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:45:01,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-18 18:45:01,568 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 [2023-12-18 18:45:01,568 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:45:01,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:45:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2075934170, now seen corresponding path program 28 times [2023-12-18 18:45:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:45:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962248516] [2023-12-18 18:45:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:45:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:45:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:45:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 46 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:45:03,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:45:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962248516] [2023-12-18 18:45:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962248516] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:45:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657500124] [2023-12-18 18:45:03,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:45:03,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:45:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:45:03,257 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) [2023-12-18 18:45:03,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-18 18:45:06,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:45:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:45:06,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-18 18:45:06,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:45:06,293 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 [2023-12-18 18:45:06,335 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-18 18:45:06,335 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 [2023-12-18 18:45:06,354 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-18 18:45:06,354 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 [2023-12-18 18:45:06,421 INFO L349 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2023-12-18 18:45:06,421 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 [2023-12-18 18:45:06,478 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2023-12-18 18:45:06,478 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 [2023-12-18 18:45:06,570 INFO L349 Elim1Store]: treesize reduction 117, result has 21.5 percent of original size [2023-12-18 18:45:06,570 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 [2023-12-18 18:45:06,647 INFO L349 Elim1Store]: treesize reduction 82, result has 28.1 percent of original size [2023-12-18 18:45:06,647 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 [2023-12-18 18:45:06,773 INFO L349 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2023-12-18 18:45:06,773 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 [2023-12-18 18:45:06,875 INFO L349 Elim1Store]: treesize reduction 126, result has 25.4 percent of original size [2023-12-18 18:45:06,875 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 [2023-12-18 18:45:07,042 INFO L349 Elim1Store]: treesize reduction 239, result has 18.4 percent of original size [2023-12-18 18:45:07,042 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 [2023-12-18 18:45:07,197 INFO L349 Elim1Store]: treesize reduction 178, result has 23.3 percent of original size [2023-12-18 18:45:07,197 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 [2023-12-18 18:45:07,430 INFO L349 Elim1Store]: treesize reduction 312, result has 17.2 percent of original size [2023-12-18 18:45:07,431 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 [2023-12-18 18:45:07,678 INFO L349 Elim1Store]: treesize reduction 238, result has 21.5 percent of original size [2023-12-18 18:45:07,678 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 [2023-12-18 18:45:08,200 INFO L349 Elim1Store]: treesize reduction 393, result has 16.2 percent of original size [2023-12-18 18:45:08,201 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 [2023-12-18 18:45:09,948 INFO L349 Elim1Store]: treesize reduction 306, result has 19.9 percent of original size [2023-12-18 18:45:09,948 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 [2023-12-18 18:45:16,212 INFO L349 Elim1Store]: treesize reduction 382, result has 18.6 percent of original size [2023-12-18 18:45:16,213 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 [2023-12-18 18:45:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 84 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:45:33,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:45:36,291 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 [2023-12-18 18:45:36,321 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 [2023-12-18 18:45:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 1 proven. 730 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 18:45:36,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657500124] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:45:36,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:45:36,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 32] total 62 [2023-12-18 18:45:36,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663580177] [2023-12-18 18:45:36,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:45:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-18 18:45:36,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:45:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-18 18:45:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=3390, Unknown=4, NotChecked=0, Total=3782 [2023-12-18 18:45:36,400 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 62 states, 62 states have (on average 2.806451612903226) internal successors, (174), 62 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) [2023-12-18 18:45:48,187 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] [2023-12-18 18:45:53,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:45:54,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:45:58,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:04,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:09,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:13,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:15,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:19,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:22,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:27,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:30,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:35,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:39,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:43,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:47,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:51,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:55,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:46:59,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:03,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:08,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:12,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:14,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:18,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:19,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:23,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:27,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:28,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:32,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:34,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:38,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:42,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:43,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:47,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:49,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:53,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:55,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:47:59,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:04,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:08,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:13,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:18,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:23,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:28,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:33,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:38,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:42,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:47,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:52,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:48:57,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:02,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:07,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:11,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:16,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:21,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:26,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:31,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:36,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:40,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:45,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:50,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:49:55,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:00,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:05,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:10,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:15,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:20,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:24,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:29,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:34,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:39,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:44,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:49,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:50:54,092 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] [2023-12-18 18:50:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:50:54,870 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2023-12-18 18:50:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-12-18 18:50:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.806451612903226) internal successors, (174), 62 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 [2023-12-18 18:50:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:50:54,871 INFO L225 Difference]: With dead ends: 255 [2023-12-18 18:50:54,871 INFO L226 Difference]: Without dead ends: 253 [2023-12-18 18:50:54,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 144 SyntacticMatches, 37 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4526 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1124, Invalid=12212, Unknown=4, NotChecked=0, Total=13340 [2023-12-18 18:50:54,873 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 5230 mSolverCounterSat, 45 mSolverCounterUnsat, 60 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 5335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5230 IncrementalHoareTripleChecker+Invalid, 60 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 315.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:50:54,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1818 Invalid, 5335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5230 Invalid, 60 Unknown, 0 Unchecked, 315.6s Time] [2023-12-18 18:50:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-12-18 18:50:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 128. [2023-12-18 18:50:54,938 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) [2023-12-18 18:50:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2023-12-18 18:50:54,939 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 100 [2023-12-18 18:50:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:50:54,939 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2023-12-18 18:50:54,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.806451612903226) internal successors, (174), 62 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) [2023-12-18 18:50:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2023-12-18 18:50:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-18 18:50:54,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:50:54,940 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:50:54,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-18 18:50:55,149 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 [2023-12-18 18:50:55,149 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:50:55,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:50:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash -915426708, now seen corresponding path program 29 times [2023-12-18 18:50:55,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:50:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047004403] [2023-12-18 18:50:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:50:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:50:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:50:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 46 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:50:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:50:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047004403] [2023-12-18 18:50:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047004403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:50:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516888194] [2023-12-18 18:50:56,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:50:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:50:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:50:56,880 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) [2023-12-18 18:50:56,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-18 18:50:59,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-12-18 18:50:59,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:50:59,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-18 18:50:59,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:00,011 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 [2023-12-18 18:51:00,044 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 [2023-12-18 18:51:00,051 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 [2023-12-18 18:51:00,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,098 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 [2023-12-18 18:51:00,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,108 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 [2023-12-18 18:51:00,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,156 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 [2023-12-18 18:51:00,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,167 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 [2023-12-18 18:51:00,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,225 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 [2023-12-18 18:51:00,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,240 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 [2023-12-18 18:51:00,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,305 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 [2023-12-18 18:51:00,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,320 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 [2023-12-18 18:51:00,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,393 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 [2023-12-18 18:51:00,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,408 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 [2023-12-18 18:51:00,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:51:00,474 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 [2023-12-18 18:51:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:01,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:02,493 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 [2023-12-18 18:51:02,508 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 [2023-12-18 18:51:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 70 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516888194] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:03,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 95 [2023-12-18 18:51:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171197738] [2023-12-18 18:51:03,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-18 18:51:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-18 18:51:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=7833, Unknown=0, NotChecked=0, Total=8930 [2023-12-18 18:51:03,633 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) [2023-12-18 18:51:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:07,832 INFO L93 Difference]: Finished difference Result 322 states and 337 transitions. [2023-12-18 18:51:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-12-18 18:51:07,833 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 [2023-12-18 18:51:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:07,833 INFO L225 Difference]: With dead ends: 322 [2023-12-18 18:51:07,834 INFO L226 Difference]: Without dead ends: 320 [2023-12-18 18:51:07,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6627 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2474, Invalid=20176, Unknown=0, NotChecked=0, Total=22650 [2023-12-18 18:51:07,835 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 166 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 5825 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 5876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:07,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1283 Invalid, 5876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5825 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 18:51:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-18 18:51:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 143. [2023-12-18 18:51:07,921 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) [2023-12-18 18:51:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2023-12-18 18:51:07,922 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 103 [2023-12-18 18:51:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:07,922 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2023-12-18 18:51:07,922 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) [2023-12-18 18:51:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2023-12-18 18:51:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-18 18:51:07,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:07,923 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:07,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:08,133 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 [2023-12-18 18:51:08,133 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:08,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 777126124, now seen corresponding path program 30 times [2023-12-18 18:51:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945831670] [2023-12-18 18:51:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945831670] [2023-12-18 18:51:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945831670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130539308] [2023-12-18 18:51:08,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:51:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:08,539 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) [2023-12-18 18:51:08,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-18 18:51:10,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-18 18:51:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:10,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 18:51:10,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:11,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130539308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:11,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2023-12-18 18:51:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927579169] [2023-12-18 18:51:11,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:11,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-18 18:51:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-18 18:51:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 18:51:11,851 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) [2023-12-18 18:51:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:12,450 INFO L93 Difference]: Finished difference Result 349 states and 356 transitions. [2023-12-18 18:51:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 18:51:12,458 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 [2023-12-18 18:51:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:12,459 INFO L225 Difference]: With dead ends: 349 [2023-12-18 18:51:12,459 INFO L226 Difference]: Without dead ends: 292 [2023-12-18 18:51:12,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 155 SyntacticMatches, 32 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2023-12-18 18:51:12,459 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 190 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:12,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 148 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:51:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-18 18:51:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 143. [2023-12-18 18:51:12,547 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) [2023-12-18 18:51:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2023-12-18 18:51:12,547 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 103 [2023-12-18 18:51:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:12,547 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2023-12-18 18:51:12,548 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) [2023-12-18 18:51:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2023-12-18 18:51:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-18 18:51:12,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:12,548 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:12,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:12,756 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 [2023-12-18 18:51:12,756 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:12,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 728738344, now seen corresponding path program 31 times [2023-12-18 18:51:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:12,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194041378] [2023-12-18 18:51:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:12,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:13,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194041378] [2023-12-18 18:51:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194041378] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878628459] [2023-12-18 18:51:13,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:51:13,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:13,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:13,795 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) [2023-12-18 18:51:13,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-18 18:51:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:14,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-18 18:51:14,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:14,430 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 [2023-12-18 18:51:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:15,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:15,489 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 [2023-12-18 18:51:15,490 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 [2023-12-18 18:51:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878628459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:15,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:15,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2023-12-18 18:51:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664311931] [2023-12-18 18:51:15,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-18 18:51:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-18 18:51:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5295, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 18:51:15,534 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) [2023-12-18 18:51:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:18,064 INFO L93 Difference]: Finished difference Result 367 states and 373 transitions. [2023-12-18 18:51:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-18 18:51:18,064 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 [2023-12-18 18:51:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:18,065 INFO L225 Difference]: With dead ends: 367 [2023-12-18 18:51:18,065 INFO L226 Difference]: Without dead ends: 365 [2023-12-18 18:51:18,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 158 SyntacticMatches, 17 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=517, Invalid=11473, Unknown=0, NotChecked=0, Total=11990 [2023-12-18 18:51:18,066 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 4418 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 4472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:18,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1204 Invalid, 4472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4418 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 18:51:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-18 18:51:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 143. [2023-12-18 18:51:18,162 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) [2023-12-18 18:51:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2023-12-18 18:51:18,163 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 106 [2023-12-18 18:51:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:18,163 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2023-12-18 18:51:18,163 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) [2023-12-18 18:51:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2023-12-18 18:51:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-18 18:51:18,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:18,164 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:18,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:18,370 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 [2023-12-18 18:51:18,370 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:18,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1210338518, now seen corresponding path program 32 times [2023-12-18 18:51:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:18,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510746385] [2023-12-18 18:51:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 393 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:18,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:18,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510746385] [2023-12-18 18:51:18,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510746385] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:18,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273275147] [2023-12-18 18:51:18,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:51:18,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:18,932 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) [2023-12-18 18:51:18,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-18 18:51:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:51:19,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:19,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 18:51:19,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:19,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273275147] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:20,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:20,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2023-12-18 18:51:20,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372556661] [2023-12-18 18:51:20,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:20,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-18 18:51:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-18 18:51:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2023-12-18 18:51:20,183 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) [2023-12-18 18:51:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:20,776 INFO L93 Difference]: Finished difference Result 310 states and 316 transitions. [2023-12-18 18:51:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 18:51:20,777 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 [2023-12-18 18:51:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:20,778 INFO L225 Difference]: With dead ends: 310 [2023-12-18 18:51:20,778 INFO L226 Difference]: Without dead ends: 250 [2023-12-18 18:51:20,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 164 SyntacticMatches, 34 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 18:51:20,779 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:20,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 222 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:51:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-18 18:51:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2023-12-18 18:51:20,872 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) [2023-12-18 18:51:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2023-12-18 18:51:20,872 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 109 [2023-12-18 18:51:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:20,873 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2023-12-18 18:51:20,873 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) [2023-12-18 18:51:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2023-12-18 18:51:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-18 18:51:20,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:20,873 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:20,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:21,079 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 [2023-12-18 18:51:21,079 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:21,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash 314531302, now seen corresponding path program 33 times [2023-12-18 18:51:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611676544] [2023-12-18 18:51:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:21,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 64 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:22,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:22,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611676544] [2023-12-18 18:51:22,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611676544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:22,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890613551] [2023-12-18 18:51:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:51:22,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:22,929 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) [2023-12-18 18:51:22,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-18 18:51:28,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-12-18 18:51:28,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:28,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-18 18:51:28,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:29,013 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 [2023-12-18 18:51:29,058 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-18 18:51:29,059 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 [2023-12-18 18:51:29,069 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-18 18:51:29,070 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 [2023-12-18 18:51:29,143 INFO L349 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2023-12-18 18:51:29,143 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 [2023-12-18 18:51:29,205 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2023-12-18 18:51:29,205 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 [2023-12-18 18:51:29,304 INFO L349 Elim1Store]: treesize reduction 117, result has 21.5 percent of original size [2023-12-18 18:51:29,304 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 [2023-12-18 18:51:29,386 INFO L349 Elim1Store]: treesize reduction 82, result has 28.1 percent of original size [2023-12-18 18:51:29,386 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 [2023-12-18 18:51:29,502 INFO L349 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2023-12-18 18:51:29,503 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 [2023-12-18 18:51:29,597 INFO L349 Elim1Store]: treesize reduction 126, result has 25.4 percent of original size [2023-12-18 18:51:29,597 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 [2023-12-18 18:51:29,739 INFO L349 Elim1Store]: treesize reduction 239, result has 18.4 percent of original size [2023-12-18 18:51:29,739 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 [2023-12-18 18:51:29,851 INFO L349 Elim1Store]: treesize reduction 178, result has 23.3 percent of original size [2023-12-18 18:51:29,851 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 [2023-12-18 18:51:30,061 INFO L349 Elim1Store]: treesize reduction 312, result has 17.2 percent of original size [2023-12-18 18:51:30,062 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 [2023-12-18 18:51:30,322 INFO L349 Elim1Store]: treesize reduction 238, result has 21.5 percent of original size [2023-12-18 18:51:30,323 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 [2023-12-18 18:51:30,886 INFO L349 Elim1Store]: treesize reduction 393, result has 16.2 percent of original size [2023-12-18 18:51:30,886 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 [2023-12-18 18:51:33,755 INFO L349 Elim1Store]: treesize reduction 306, result has 19.9 percent of original size [2023-12-18 18:51:33,756 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 [2023-12-18 18:51:43,561 INFO L349 Elim1Store]: treesize reduction 382, result has 18.6 percent of original size [2023-12-18 18:51:43,561 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 [2023-12-18 18:52:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 81 proven. 891 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:52:02,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:56:12,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 119